Offer a NOTIFY_NO_DELAY flag for notifications.

We've heard reports that some ContentProviders are sensitive to their
notifications being delayed, so this change adds a NOTIFY_NO_DELAY
flag that they can use to bypass any background delays.

Bug: 149370968
Test: none
Change-Id: I0465c8dee92cd5708c04035bc0396ce2d1083f67
2 files changed