Make the tap-to-edit behaviour configurable

Add a new key-value pair to smart_replies_in_notifications_flags that
controls the default tap-to-edit behaviour.

Bug: 111437455
Test: atest SmartReplyConstantsTest
Test: Try "adb shell settings put global smart_replies_in_notifications_flags edit_choices_before_sending=true" and observe
Change-Id: Ida90b98c28f4183697e84a6722768d41c72dd9cf
5 files changed