render thread early preload optimizations

  1. preload eglContext when renderthread preload is called so setSurface
work is not waiting for this work during app launch crit path.
  2. Additionally queue GraphicBufferAllocator instance get, so
allocateBuffer does not wait for initialization during app launch
critical path.

Impact: Large improvement in app launch latency for low core devices
 - ~70ms of improvement in our view based app launch
 - ~27ms of improvement in material3 compose base app launch

Test: manual built and flashed
Bug: 383612849
Flag: early_preload_gl_context
Change-Id: I580e31de1d3a9878cf102dfdcad39bfd64bf2c53