Listen for launcher package added to connect to it faster

When launcher is reinstalled, it may take time for it to get ready and
to reconnect to. If not available immediately it would try to connect it
later after a timeout. Instead of waiting, receive a broadcast when it
gets installed to connect immediately.

Test: manual - reinstall launcher
Bug: 67957962
Change-Id: I1e531db9646d11a1eae99abe46d5e6f852c5eeda