apps have/send signature perms for broadcast receiving, send perm label
to Sandbox
trying to merge
Merge remote-tracking branch 'origin/master'

Conflicts:
	AppB/src/com/privacy/sandboxedapp/DataReceiver.java
	AppB/src/com/privacy/sandboxedapp/SandboxedMainActivity.java
	Sandbox/src/com/privacy/sandbox/RequestReceiver.java
	SandboxedApp/src/com/privacy/sandboxedapp/DataReceiver.java