Added android.software.device_admin feature.

This feature allow the device to be managed by a device owner app.

NOTE: not fully supported yet, CTS tests are still failing.

Bug: 178412797
Test: adb shell pm list features | grep admin || echo NOT_FOUND

Change-Id: Ie0f7daa176e6c4a78b9dc28ed856f70b638fe73a
1 file changed