In TransactionFlinger, don't wrap the SurfaceView with an AndroidView

AndroidView disables fun optimizations like transparent region hints.
The reason why is mysterious, and probably important, but the CL author
didn't investigate :). Regardless, this is just simpler to do.

Bug: 405591499
Flag: EXEMPT TEST_ONLY
Test: builds and run TransactionFlinger
Change-Id: I8603a538c4c1a0bfc4f31b772f30d26f923d23ac