Fix splashscreen not showing <= API 30 (#4889)

Task/Issue URL:
https://app.asana.com/0/1207908166761516/1206826738295232/f

### Description

The splashscreen was not showing on devices on devices <= API 30.

To fix this I used the
[spashscreen-compat](https://developer.android.com/develop/ui/views/launch/splash-screen/migrate#library)
library and removed the need for dedicated splashscreen styles on API
31+ as the compat library will take of that for us.

The splashscreen is very quick on a warm start on <= API 30 (see the
demos) but I don’t think it’s worth adding any kind of artificial delay
to show it for a longer period.

### Steps to test this PR

If you have a device that’s <= API 31 to test then please do!
Unfortunately I do not have a device on hand at that API level.

- [x] Pick a device <= API 31 (preferably not an emulator)
- [x] Install the app
- [x] Run the app
- [x] Check that the splashscreen shows
- [x] Pick a device > API 30 (preferably not an emulator)
- [x] Install the app
- [x] Run the app
- [x] Ensure the splashscreen is still present

### UI changes

API 26 before shown as a demo for all devices < 30

I’ve provided some before videos on actual devices on >= API 30  

| Before  | After  |
|---|---|
| <video width="630" height="300"
src="https://github.com/user-attachments/assets/96865454-d52f-422d-ac47-3bb2c9192693"></video>
| <video width="630" height="300"
src="https://github.com/user-attachments/assets/e2b61703-29a5-4bc0-b860-42e228712faf"></video>
|
| | <video width="630" height="300"
src="https://github.com/user-attachments/assets/697d51c5-e631-425f-924b-fdbc961c9501"></video>
|
| | <video width="630" height="300"
src="https://github.com/user-attachments/assets/8517e14e-92de-44ac-8fac-2690f1349c34"></video>
|
| | <video width="630" height="300"
src="https://github.com/user-attachments/assets/64a840c7-b1ea-4b33-922d-f08e5ce89135"></video>
|
| <video width="630" height="300"
src="https://github.com/user-attachments/assets/1baf0195-2a4d-42e8-9eb0-f83548ed4de3"></video>
| <video width="630" height="300"
src="https://github.com/user-attachments/assets/843a5c23-4c41-4b92-9a79-90307c095409"></video>
|
| <video width="630" height="300"
src="https://github.com/user-attachments/assets/074121e5-a8be-4d60-9336-826b09235406"></video>
| <video width="630" height="300"
src="https://github.com/user-attachments/assets/93d696a8-2d7d-4ff8-9d79-ed1df495be63"></video>
|
| | <video width="630" height="300"
src="https://github.com/user-attachments/assets/5517bb27-d4ac-45c7-8e2a-c67e98e1a51f"></video>
|
| <video width="630" height="300"
src="https://github.com/user-attachments/assets/f5b1f5a6-d026-4b32-a4cd-0668b9cdd016"></video>
| <video width="630" height="300"
src="https://github.com/user-attachments/assets/d74dd3b5-8976-4f13-9537-930a79c1a4b2"></video>
|
| <video width="630" height="300"
src="https://github.com/user-attachments/assets/a2cb8dbf-20fc-41ff-9db3-c61108917fce"></video>
| <video width="630" height="300"
src="https://github.com/user-attachments/assets/7ff9bcbf-a689-4e67-bdc1-42f081d00ad7"></video>
|
| | <video width="630" height="300"
src="https://github.com/user-attachments/assets/01ee9ea5-f9af-4b87-8429-86604a8017ab"></video>
|

Author: mikescamell

app/build.gradle

@@ -388,6 +388,7 @@ dependencies {
 
     // Android KTX
     implementation AndroidX.core.ktx
+    implementation AndroidX.core.splashscreen
     implementation AndroidX.fragment.ktx
 
     // ViewModel and LiveData

app/src/main/java/com/duckduckgo/app/launch/LaunchBridgeActivity.kt

@@ -17,6 +17,7 @@
 package com.duckduckgo.app.launch
 
 import android.os.Bundle
+import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
 import androidx.lifecycle.lifecycleScope
 import com.duckduckgo.anvil.annotations.InjectWith
 import com.duckduckgo.app.browser.BrowserActivity
@@ -32,7 +33,10 @@ class LaunchBridgeActivity : DuckDuckGoActivity() {
     private val viewModel: LaunchViewModel by bindViewModel()
 
     override fun onCreate(savedInstanceState: Bundle?) {
+        val splashScreen = installSplashScreen()
         super.onCreate(savedInstanceState)
+        splashScreen.setKeepOnScreenCondition { true }
+
         setContentView(R.layout.activity_launch)
 
         configureObservers()

common/common-ui/build.gradle

@@ -46,6 +46,7 @@ dependencies {
     implementation AndroidX.appCompat
     implementation Google.android.material
     implementation AndroidX.constraintLayout
+    implementation AndroidX.core.splashscreen
     implementation AndroidX.recyclerView
     implementation AndroidX.lifecycle.viewModelKtx
     // just to get the dagger annotations

common/common-ui/src/main/res/values-night-v31/design-system-theming.xml

@@ -15,5 +15,12 @@
   -->
 
 <resources xmlns:tools="http://schemas.android.com/tools">
-    <style name="Theme.DuckDuckGo.SplashScreen" parent="Theme.DuckDuckGo.Dark" />
+    <style name="Theme.DuckDuckGo.SplashScreen" parent="Theme.DuckDuckGo.Splash">
+        <item name="android:statusBarColor">@color/black</item>
+        <item name="android:windowLightStatusBar">false</item>
+        <item name="android:navigationBarColor">@color/black</item>
+
+        <item name="windowSplashScreenBackground">@color/black</item>
+        <item name="postSplashScreenTheme">@style/Theme.DuckDuckGo.Dark</item>
+    </style>
 </resources>

common/common-ui/src/main/res/values-night/design-system-theming.xml

@@ -296,7 +296,18 @@
         <item name="daxColorPrimaryIcon">@color/white</item>
     </style>
 
-    <style name="Theme.DuckDuckGo.SplashScreen" parent="Theme.DuckDuckGo.Light"/>
+    <style name="Theme.DuckDuckGo.SplashScreen" parent="Theme.DuckDuckGo.Splash">
+        <item name="android:statusBarColor">@color/whiteFive</item>
+        <item name="android:windowLightStatusBar">true</item>
+        <item name="android:navigationBarColor">@color/whiteFive</item>
+
+        <item name="windowSplashScreenBackground">@color/whiteFive</item>
+        <item name="postSplashScreenTheme">@style/Theme.DuckDuckGo.Light</item>
+    </style>
+
+    <style name="Theme.DuckDuckGo.Splash" parent="Theme.SplashScreen">
+        <item name="windowSplashScreenAnimatedIcon">@drawable/ic_dax_splash_screen_icon</item>
+    </style>
 
     <style name="Theme.AppCompat.Transparent.NoActionBar" parent="Theme.AppCompat.Light.NoActionBar">
         <item name="android:windowIsTranslucent">true</item>

common/common-ui/src/main/res/values-v31/design-system-theming.xml

@@ -19,6 +19,8 @@ version.androidx.constraintlayout=2.1.4
 
 version.androidx.biometric=1.1.0
 
+version.androidx.core-splashscreen=1.0.1
+
 version.androidx.datastore=1.1.1
 
 version.androidx.localbroadcastmanager=1.1.0