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/proguard.flags b/proguard.flags
index 37b8093..a450183 100644
--- a/proguard.flags
+++ b/proguard.flags
@@ -45,9 +45,10 @@
 
 # BUG(70852369): Surpress additional warnings after changing from Proguard to R8
 -dontwarn android.app.**
--dontwarn android.view.**
--dontwarn android.os.**
 -dontwarn android.graphics.**
+-dontwarn android.os.**
+-dontwarn android.view.**
+-dontwarn android.window.**
 
 # Ignore warnings for hidden utility classes referenced from the shared lib
 -dontwarn com.android.internal.util.**