Add a Java backend for android.hardware.graphics.common AIDL

This will allow SysUI to access the same struct (in
I27f119f927b23052c5fd8f068cbca75338fe7b91) that HWC uses to describe
its support for DISPLAY_DECORATION.

@hide each API individually. SysUI can access hidden APIs. Otherwise
leave the AIDL files are unchanged.

Bug: 216644902
Test: make
Change-Id: Id33f76e4c55b22d007c7e2314a4dfb778562bace