launcher3: Improve SimpleBroadcastReceiver.
Unless explicitly annotated, parameters in java are by
default nullable. There are a few cases where a null context
may be passed to the unregisterReceiverSafely function
of SimpleBroadcastReceiver.
To mitigate misuses or incorrect contexts being passed for
register vs unregister, keep the context as a strong reference
in the constructor.
Also added NonNull annotations for any public callsites to
enforce behavior.
Bug: 395019017, 395966395
Flag: NONE - bug fixed
Test: manual - presubmit
Change-Id: Ie371fa45cadceaf51cf184b446df9123ef27c337
16 files changed