[QPR1][Security] Fix RequestIgnoreBatteryOptimizations info disclosure

after discussed with kdeus@ we will remove the setResult() from the
dialog action to avoid the caller apps can distinguish the users
interaction behavior, and declared REQUEST_IGNORE_BATTERY_OPTIMIZATIONS
in other applications.

Bug: 195963373
Test: make SettingsRoboTests
Change-Id: Ia2e47c493c206e96b0bc1d9f08735c0f9474c233
Merged-In: Ia2e47c493c206e96b0bc1d9f08735c0f9474c233
(cherry picked from commit 518d6df4)