Misc RenderEngine perf fixes

- Disable AA for clip masks when layers are rotated. Generating clip masks on the CPU can take 1-10ms depending on the clip mask size.
- Precache rotated image shaders. This prevents a cache miss when PiP is initially rotated
- Precache box shadow and outline shaders.

Bug: 424160207
Bug: 421025291
Bug: 367464660

Test: Launch, rotate, and exit PiP. Ensure no shaders are compiled.
Flag: EXEMPT bugfix
Change-Id: I905adfb23ac8edbed135d0dc9aff3e2a3c743e77