Don't set mNextDrawUseBlastSync when hardware is not enabled

Otherwise, it will make the ViewRootImpl pause forever. Because there
won't be any frame-drawing callback where we clear the flag.

Fix: 182797514
Test: steps in the bug
Change-Id: Iadd35f1b112626399c064a1cd7d7da323bb9e36c

core/java/android/view/ViewRootImpl.java

@@ -3207,7 +3207,9 @@ public final class ViewRootImpl implements ViewParent,
                 Log.d(mTag, "Relayout called with blastSync");
             }
             reportNextDraw();
-            mNextDrawUseBlastSync = true;
+            if (isHardwareEnabled()) {
+                mNextDrawUseBlastSync = true;
+            }
         }
 
         boolean cancelDraw = mAttachInfo.mTreeObserver.dispatchOnPreDraw() || !isViewVisible;