Migrating Bluetooth resources to Bluetooth module

In order for the Bluetooth module to build as an apex
all non-public resources must be located in the same
package.
Power usage configs are made system properties to
enable android.internal.os to read them and still have
per device overlays.
All configs used only by the Bluetooth app are moved to
the Bluetooth module.
Vendor overlays will be updated once the migration is done.

Tag: #feature
Bug: 211570675
Test: build, manual
Test: make RunSettingsRoboTests
Test: Added and logged system properties in vendors
Change-Id: I2b0134b97b687d6c7e96f7700be0c196168f0601