Update documentation for Scoped Storage compat flags

Bug: 132649864
Test: builds
Merged-In: Ia344c77ee90c6fbac1731d8d1f805b81639fe3d4
Change-Id: Ia344c77ee90c6fbac1731d8d1f805b81639fe3d4
(cherry picked from commit d70afb49efd75a9b9cea3a2c4f5975eed802d7f4)
1 file changed