Reset alpha of media when not fading

Since the QSAnimator can run even when QS is not visible, the media host
could be set to alpha 0 when rotated to landscape, and never reset to 1
once rotated back to portrait. So, this explicitly resets the alpha if the
animation builder is being set up in portrait mode.

Fixes: 192939241
Test: follow repro steps in bug, observe media visible
Change-Id: Ice6087b0d2dee0a575003bb888c93ea91cee931a

packages/SystemUI/src/com/android/systemui/qs/QSAnimator.java

@@ -423,6 +423,9 @@ public class QSAnimator implements Callback, PageListener, Listener, OnLayoutCha
             if (mQsPanelController.shouldUseHorizontalLayout()
                     && mQsPanelController.mMediaHost.hostView != null) {
                 builder.addFloat(mQsPanelController.mMediaHost.hostView, "alpha", 0, 1);
+            } else {
+                // In portrait, media view should always be visible
+                mQsPanelController.mMediaHost.hostView.setAlpha(1.0f);
             }
             mAllPagesDelayedAnimator = builder.build();
             mAllViews.add(mSecurityFooter.getView());