Introduce BATTERY_PREDICTION permission.

DEVICE_POWER is very powerful, so introduce the BATTERY_PREDICTION
permission to allow privileged apps with the permission to provide the
system with battery predictions.

Bug: 139413884
Test: atest android.os.cts.PowerManagerTest
Test: atest android.permission.cts.PowerManagerServicePermissionTest
Test: atest CtsPermission2TestCases
Test: atest SettingsProviderTest
Change-Id: Ib52f20b5145785a5fc363601757ad9c57f40e254