Making Battery Saver policy setting more defensive.

1. Making a full copy of the config Builder's map so that changing
the map in the builder doesn't change the config's map.

2. Ensuring that location mode and brightness adjustment factors are
within valid ranges.

Bug: 129474588
Test: manual
Change-Id: I6117b7857afa10d71c1fc3de818c51d8719a281b