Allow dumpstate to call incident CLI

Instead of relying on the regular iteration through the system
services inside dumpstate, dumpstate now uses a dedicated incident CLI
to capture incident report. This patch makes required SELinux changes
to make it happen.

Bug: 137493082
Test: Manually takes a bugreport from command line, power button, and
      BetterBug. Verifies /proto/incident_report.proto exists in the
      zip file, and no unintended avc denial.

Change-Id: I0d93b015b7a9d32db4f3bf10d1c25e5a3ca04e48
1 file changed