Support launcher animations in new transition system

Hook up the shell-transitions RemoteTransition to
launcher.

Bug: 169035082
Test: Launch an app from a launcher icon and observe
Change-Id: Ie327c11bbc59f19fb969f159f8380c10e4a84e50
diff --git a/src/com/android/launcher3/LauncherAppTransitionManager.java b/src/com/android/launcher3/LauncherAppTransitionManager.java
index 24e0d14..ac3ad9f 100644
--- a/src/com/android/launcher3/LauncherAppTransitionManager.java
+++ b/src/com/android/launcher3/LauncherAppTransitionManager.java
@@ -67,4 +67,18 @@
     public void unregisterRemoteAnimations() {
         // Do nothing
     }
+
+    /**
+     * Registers remote transitions for certain system transitions.
+     */
+    public void registerRemoteTransitions() {
+        // Do nothing
+    }
+
+    /**
+     * Unregisters all remote transitions.
+     */
+    public void unregisterRemoteTransitions() {
+        // Do nothing
+    }
 }