There is no real need to access the manifest.json (which is being
renamed in other CLs anyway). So remove the access to it.
Bug: 119672727
Test: m, installed on device, boots.
Change-Id: I2d82062031da36f871b2a64d97a50a6f1e6fc3dd
Gathering file contexts for all APEXes there for easier auditing.
Test: m com.android.resolv
Bug: 119527674
Change-Id: I0f06c21c77f4b537e7c7d590204569f4531b5302