Refresh opacity and statefulness on tint change

Also warns when LayerDrawable is created with an invalid child. This
is not guaranteed to fail, but it's usually a bad sign.

Bug: 33124798
Test: LayerDrawableTest, DrawableContainerTest
Change-Id: Ie3e4200b27a9814cee7f5711d7df9710db513953

graphics/java/android/graphics/drawable/DrawableContainer.java

@@ -210,6 +210,7 @@ public class DrawableContainer extends Drawable implements Drawable.Callback {
     /**
      * Change the global fade duration when a new drawable is entering
      * the scene.
+     *
      * @param ms The amount of time to fade in milliseconds.
      */
     public void setEnterFadeDuration(int ms) {
@@ -219,6 +220,7 @@ public class DrawableContainer extends Drawable implements Drawable.Callback {
     /**
      * Change the global fade duration when a new drawable is leaving
      * the scene.
+     *
      * @param ms The amount of time to fade in milliseconds.
      */
     public void setExitFadeDuration(int ms) {
@@ -375,6 +377,13 @@ public class DrawableContainer extends Drawable implements Drawable.Callback {
 
     @Override
     public void invalidateDrawable(@NonNull Drawable who) {
+        // This may have been called as the result of a tint changing, in
+        // which case we may need to refresh the cached statefulness or
+        // opacity.
+        if (mDrawableContainerState != null) {
+            mDrawableContainerState.invalidateCache();
+        }
+
         if (who == mCurrDrawable && getCallback() != null) {
             getCallback().invalidateDrawable(this);
         }
@@ -822,8 +831,8 @@ public class DrawableContainer extends Drawable implements Drawable.Callback {
             mDrawables[pos] = dr;
             mNumChildren++;
             mChildrenChangingConfigurations |= dr.getChangingConfigurations();
-            mCheckedStateful = false;
-            mCheckedOpacity = false;
+
+            invalidateCache();
 
             mConstantPadding = null;
             mCheckedPadding = false;
@@ -833,6 +842,14 @@ public class DrawableContainer extends Drawable implements Drawable.Callback {
             return pos;
         }
 
+        /**
+         * Invalidates the cached opacity and statefulness.
+         */
+        void invalidateCache() {
+            mCheckedOpacity = false;
+            mCheckedStateful = false;
+        }
+
         final int getCapacity() {
             return mDrawables.length;
         }