Cherry pick TextureView fixes

The following changes are in this commit:

Avoid destroying TextureView surfaces for onStop

bug:30238922

TextureViews will hold onto their backing surfaces, which will allow
them to resume gracefully when the app's surfaces are saved.

Now only resources that are destroyed for onStop are DisplayLists.

(cherry picked from commit 391d560402)

TextureView: destroy layer on destroyHardwareResources event

bug:30468770

(cherry picked from commit 1c16c37d86)

Fix NPE in TextureView

Bug: 30651595

(cherry picked from commit 3c2587f26e)

Fix NPE in TextureView

Bug: 30779663

(cherry picked from commit 7e237189c2)

Fix maps resume being blank

Bug: 30889568

Fixes an issue where mLayer didn't have
the mSurface set on it in certain resume
scenarios.

(cherry picked from commit 03df0834e6)

core/java/android/view/TextureView.java

@@ -218,15 +218,32 @@ public class TextureView extends View {
     /** @hide */
     @Override
     protected void onDetachedFromWindowInternal() {
-        destroySurface();
+        destroyHardwareLayer();
+        releaseSurfaceTexture();
         super.onDetachedFromWindowInternal();
     }
 
-    private void destroySurface() {
+    /**
+     * @hide
+     */
+    @Override
+    protected void destroyHardwareResources() {
+        destroyHardwareLayer();
+    }
+
+    private void destroyHardwareLayer() {
         if (mLayer != null) {
             mLayer.detachSurfaceTexture();
+            mLayer.destroy();
+            mLayer = null;
+            mMatrixChanged = true;
+        }
+    }
 
+    private void releaseSurfaceTexture() {
+        if (mSurface != null) {
             boolean shouldRelease = true;
+
             if (mListener != null) {
                 shouldRelease = mListener.onSurfaceTextureDestroyed(mSurface);
             }
@@ -235,14 +252,10 @@ public class TextureView extends View {
                 nDestroyNativeWindow();
             }
 
-            mLayer.destroy();
-            if (shouldRelease) mSurface.release();
+            if (shouldRelease) {
+                mSurface.release();
+            }
             mSurface = null;
-            mLayer = null;
-
-            // Make sure if/when new layer gets re-created, transform matrix will
-            // be re-applied.
-            mMatrixChanged = true;
             mHadSurface = true;
         }
     }
@@ -355,17 +368,6 @@ public class TextureView extends View {
         }
     }
 
-    /**
-     * @hide
-     */
-    @Override
-    protected void destroyHardwareResources() {
-        super.destroyHardwareResources();
-        destroySurface();
-        invalidateParentCaches();
-        invalidate(true);
-    }
-
     HardwareLayer getHardwareLayer() {
         if (mLayer == null) {
             if (mAttachInfo == null || mAttachInfo.mHardwareRenderer == null) {
@@ -373,17 +375,17 @@ public class TextureView extends View {
             }
 
             mLayer = mAttachInfo.mHardwareRenderer.createTextureLayer();
-            if (!mUpdateSurface) {
+            boolean createNewSurface = (mSurface == null);
+            if (createNewSurface) {
                 // Create a new SurfaceTexture for the layer.
                 mSurface = new SurfaceTexture(false);
-                mLayer.setSurfaceTexture(mSurface);
+                nCreateNativeWindow(mSurface);
             }
+            mLayer.setSurfaceTexture(mSurface);
             mSurface.setDefaultBufferSize(getWidth(), getHeight());
-            nCreateNativeWindow(mSurface);
-
             mSurface.setOnFrameAvailableListener(mUpdateListener, mAttachInfo.mHandler);
 
-            if (mListener != null && !mUpdateSurface) {
+            if (mListener != null && createNewSurface) {
                 mListener.onSurfaceTextureAvailable(mSurface, getWidth(), getHeight());
             }
             mLayer.setLayerPaint(mLayerPaint);
@@ -742,9 +744,11 @@ public class TextureView extends View {
                     "released SurfaceTexture");
         }
         if (mSurface != null) {
+            nDestroyNativeWindow();
             mSurface.release();
         }
         mSurface = surfaceTexture;
+        nCreateNativeWindow(mSurface);
 
         /*
          * If the view is visible and we already made a layer, update the