Do not use @SystemApi(client = MODULE_APPS) (documents/settings)

There will be no special protection mechanisms around MODULE_APPS,
so we're going to remove it for now.

All the MODULE_APPS should be protected with a permission, etc, so
the change should be safe.

Bug: 148177503
Test: Build / treehugger
Change-Id: I76328c2d5aaa3f171bf8afde5b3d1accad8c2e2b
Merged-In: I76328c2d5aaa3f171bf8afde5b3d1accad8c2e2b
3 files changed