Messaging: Meet Play memory/R8 rules, ship Q icon, and polish home chrome

Co-authored-by: Cursor <cursoragent@cursor.com>

app/src/main/java/com/android/messaging/BugleApplication.java

@@ -128,6 +128,18 @@ public class BugleApplication extends Application implements UncaughtExceptionHa
         Trace.endSection();
     }
 
+    @Override
+    public void onTrimMemory(final int level) {
+        super.onTrimMemory(level);
+        if (level < TRIM_MEMORY_UI_HIDDEN) {
+            return;
+        }
+        if (LogUtil.isLoggable(TAG, LogUtil.DEBUG)) {
+            LogUtil.d(TAG, "BugleApplication.onTrimMemory " + level);
+        }
+        reclaimCachedBitmaps();
+    }
+
     @Override
     public void onLowMemory() {
         super.onLowMemory();
@@ -135,7 +147,14 @@ public class BugleApplication extends Application implements UncaughtExceptionHa
         if (LogUtil.isLoggable(TAG, LogUtil.DEBUG)) {
             LogUtil.d(TAG, "BugleApplication.onLowMemory");
         }
-        Factory.get().reclaimMemory();
+        reclaimCachedBitmaps();
+    }
+
+    private static void reclaimCachedBitmaps() {
+        final Factory factory = Factory.get();
+        if (factory != null) {
+            factory.reclaimMemory();
+        }
     }
 
     @Override