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/InCallService.java b/telecomm/java/android/telecom/InCallService.java
index 69de89d..5d68aae 100644
--- a/telecomm/java/android/telecom/InCallService.java
+++ b/telecomm/java/android/telecom/InCallService.java
@@ -87,7 +87,8 @@
 
             switch (msg.what) {
                 case MSG_SET_IN_CALL_ADAPTER:
-                    mPhone = new Phone(new InCallAdapter((IInCallAdapter) msg.obj));
+                    String callingPackage = getApplicationContext().getOpPackageName();
+                    mPhone = new Phone(new InCallAdapter((IInCallAdapter) msg.obj), callingPackage);
                     mPhone.addListener(mPhoneListener);
                     onPhoneCreated(mPhone);
                     break;
@@ -664,7 +665,8 @@
              *      {@link Connection.VideoProvider#SESSION_EVENT_TX_START},
              *      {@link Connection.VideoProvider#SESSION_EVENT_TX_STOP},
              *      {@link Connection.VideoProvider#SESSION_EVENT_CAMERA_FAILURE},
-             *      {@link Connection.VideoProvider#SESSION_EVENT_CAMERA_READY}.
+             *      {@link Connection.VideoProvider#SESSION_EVENT_CAMERA_READY},
+             *      {@link Connection.VideoProvider#SESSION_EVENT_CAMERA_PERMISSION_ERROR}.
              */
             public abstract void onCallSessionEvent(int event);