Alarm Manager policy TARE page implementation

An alarm manager policy page is needed in the TARE developer option
settings to allow developers to both view and edit the current values of
all the factors under the alarm manager policy. The page uses a dropdown
so that the user can easily switch between the different policies. For
the factors with subfactors, the user simply clicks on the factor and
the subfactors will pop up under it.

Bug: 191876714
Bug: 191876567

Test: Manual (open Settings > System > Developer Options > TARE > Alarm
Manger and verify all factors are there)

Change-Id: Ie036e26df80947d23041bedfd5b1385e48069b6b