Code generation for @InspectableProperty

This does not include the annotation processing needed to build the
property model the generator consumes or support for IntEnumMapping or
IntFlagMapping. Support will be added in subsequent CLs.

Bug: 117616612
Test: atest --host view-inspector-annotation-processor-test
Change-Id: I1d7829a12c7243645a96a32c8fc22b13c70c64e1