Move IntDef constant definitions outside of the annotation

Constant definitions do not currently work in bat_land - they are not
reachable from the test, thus breaking the build.

Test: lunch bat_land && make tests
Test: bit FrameworksCoreTests:android.text.LayoutTest
Bug: 65449093
Change-Id: I6c71fe13fc86a8e2a17e49b16fd558c6714c6f5b