To support upcoming disk usage calculation optimizations, this change
creates a new GID for each app that will be used to mark its cached
data. We're allocating these unique GIDs so that we can use
quotactl() to track cached data on a per-app basis.
This change also tightens up the implementation of both the cache
and shared GID calculation to ensure that they stay inside the valid
ranges, and includes tests to verify.
Test: builds, boots, tests pass
Bug: 27948817
Change-Id: Ie4377e5aae267f2da39a165888139228995987cb
Arguably, we don't need a ScopedMinijail for a program that only execs,
but I'd rather keep the code consistent and have all uses of Minijail
be good examples.
Bug: 30156807
Change-Id: I08a968835e0f3e2afcd5e7736626edbed658cde2
We already have to have a Java and a native implementation; we don't
need _two_ native implementations.
Change-Id: I0201205ce5079ef9c747abc37b0c8122cf8fb136
