[ReactAndroid] Respect local night mode configuration for activity to play nicely with Expo client color scheme locking mechanism. expo/expo#8793

This is a squashed commits with the following changes:

commit 945096e
Author: Kudo Chien <[email protected]>
Date:   Tue Jul 27 16:49:09 2021 +0800

    [android] Upgrade androidx.appcompat to 1.2.0

    Backport from: expo/expo@58fa52e

Author: brentvatne

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/modules/appearance/AppearanceModule.java

@@ -18,6 +18,9 @@
 import com.facebook.react.bridge.WritableMap;
 import com.facebook.react.module.annotations.ReactModule;
 
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatDelegate;
+
 /** Module that exposes the user's preferred color scheme. */
 @ReactModule(name = NativeAppearanceSpec.NAME)
 public class AppearanceModule extends NativeAppearanceSpec {
@@ -50,10 +53,23 @@ public AppearanceModule(
     mColorScheme = colorSchemeForCurrentConfiguration(reactContext);
   }
 
+  // NOTE(brentvatne): this was static previously, but it wasn't necessary and we need it to not be
+  // in order to use getCurrentActivity
   private String colorSchemeForCurrentConfiguration(Context context) {
     if (mOverrideColorScheme != null) {
       return mOverrideColorScheme.getScheme();
     }
+    // NOTE(brentvatne): Same code (roughly) that we use in ExpoAppearanceModule to get the config
+    // as set by ExperienceActivityUtils to force the dark/light mode config on the activity
+    if (getCurrentActivity() instanceof AppCompatActivity) {
+      int mode = ((AppCompatActivity) getCurrentActivity()).getDelegate().getLocalNightMode();
+      switch (mode) {
+        case AppCompatDelegate.MODE_NIGHT_YES:
+          return "dark";
+        case AppCompatDelegate.MODE_NIGHT_NO:
+          return "light";
+      }
+    }
     int currentNightMode =
         context.getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
     switch (currentNightMode) {