feat: Improve APK file name formatting on save (#2421)

Author: Ushie

app/src/main/java/app/revanced/manager/ui/screen/PatcherScreen.kt

@@ -7,15 +7,27 @@ import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.activity.result.contract.ActivityResultContracts.CreateDocument
 import androidx.compose.animation.AnimatedVisibility
-import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.outlined.OpenInNew
 import androidx.compose.material.icons.outlined.FileDownload
 import androidx.compose.material.icons.outlined.PostAdd
 import androidx.compose.material.icons.outlined.Save
-import androidx.compose.material3.*
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.BottomAppBar
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.LinearProgressIndicator
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.derivedStateOf
@@ -132,7 +144,7 @@ fun PatcherScreen(
             BottomAppBar(
                 actions = {
                     IconButton(
-                        onClick = { exportApkLauncher.launch("${vm.packageName}.apk") },
+                        onClick = { exportApkLauncher.launch("${vm.packageName}_${vm.version}_revanced_patched.apk") },
                         enabled = patcherSucceeded == true
                     ) {
                         Icon(Icons.Outlined.Save, stringResource(id = R.string.save_apk))

app/src/main/java/app/revanced/manager/ui/viewmodel/PatcherViewModel.kt

@@ -83,7 +83,9 @@ class PatcherViewModel(
     private val savedStateHandle: SavedStateHandle = get()
 
     private var installedApp: InstalledApp? = null
-    val packageName = input.selectedApp.packageName
+    private val selectedApp = input.selectedApp
+    val packageName = selectedApp.packageName
+    val version = selectedApp.version
 
     var installedPackageName by savedStateHandle.saveable(
         key = "installedPackageName",