Perform camera permission and app ops check when setting camera for VT.

When a calling InCallService attempts to use the setCamera API on the
VideoCall, Telecom will perform a permission check to ensure that the
caller has the correct camera permission and passes the app-ops camera
check.  A failure to set the camera will result in a callback via the
call session event API.

This got a little messy as the app ops package name needs to come from the
InCallService, and handler usage in the VideoProvider API means we had to
pass around the uid/pid of the caller, obtained before we trampoline onto
the handler.

Test: Unit tests added, manual testing performed.
Bug: 32747443
Change-Id: I555a04f9c3fb45e60bb811f64ba855ccf2e3b0e2
diff --git a/telecomm/java/android/telecom/Phone.java b/telecomm/java/android/telecom/Phone.java
index a4ef560..30ec5b3 100644
--- a/telecomm/java/android/telecom/Phone.java
+++ b/telecomm/java/android/telecom/Phone.java
@@ -125,13 +125,16 @@
 
     private boolean mCanAddCall = true;
 
-    Phone(InCallAdapter adapter) {
+    private final String mCallingPackage;
+
+    Phone(InCallAdapter adapter, String callingPackage) {
         mInCallAdapter = adapter;
+        mCallingPackage = callingPackage;
     }
 
     final void internalAddCall(ParcelableCall parcelableCall) {
         Call call = new Call(this, parcelableCall.getId(), mInCallAdapter,
-                parcelableCall.getState());
+                parcelableCall.getState(), mCallingPackage);
         mCallByTelecomCallId.put(parcelableCall.getId(), call);
         mCalls.add(call);
         checkCallTree(parcelableCall);