Avoid sending the package-specific BATTERY_CHANGED as sticky bcast.

Sending this as sticky results in multiple sticky entries for
ACTION_BATTERY_CHANGED broadcast. This results in enqueueing multiple
broadcasts whenever someone queries for this, which is unnecessary.

Bug: 336832816
Test: manual
Flag: com.android.server.flags.pkg_targeted_battery_changed_not_sticky
Change-Id: I55c4e139646d852bec6ed195cf4599d89d0a01f7