SurfaceView: Lock mDeferredDestroySurfaceControl

Since mDeferredDestroySurfaceControl is the same underlying
object as mSurfaceControl we also need to hold the mSurfaceControlLock
when writing to it.

Bug: 157657896
Test: Existing tests pass
Change-Id: Ie0da3ed5d94c7aae2593423fa2767dbc902da4c8
1 file changed