Only allow system apps to be forceQueryable

This change ensures that only system apps can declare themselves
forceQueryable via manifest.

Fixes: 166780599
Fixes: 169739214
Test: atest AppEnumerationTests
Change-Id: Ib217ade392500f97a7ff5a08b781cc99e60838ff
Merged-In: Ib217ade392500f97a7ff5a08b781cc99e60838ff
2 files changed