DirectReply: Close if touching outside status bar

Close direct reply when a touch outside the status bar window
happens. This is especially important with HUNs, where we allow
the touch to go through to the underlying window.

Change-Id: I12b9cbd5c699b86bcf1f56723a2f0ac5de7e5a42
Test: Receive SMS while unlocked, click Reply on heads-up notification, click in between notification and IME. Verify direct reply closes.
Fixes: 32022071