In order to prevent Instant Apps from receiving potentially sensitive
broadcasts they will only receive those that the sender explicitly
exposes to Instant Apps by setting
Intent.FLAG_RECEIVER_VISIBLE_TO_INSTANT_APPS.
Bug:33350280
Test: `adb shell am broadcast` does not get delivered to Instant App
Test: `adb shell am broadcast -f 0x0x200000` gets delivered to Instant
App
Test: Verified that an Instant App can send a broadcast to itself
without FLAG_RECEIVER_VISIBLE_TO_INSTANT_APPS
Change-Id: Ie363448bf224abba530dd4caf69258939fff00af
b7e34d5508