TEST_MAPPING for BatteryStats

Creates presubmit test mapping for BatteryStats-related
files.

These tests can be run manually via
atest FrameworksServicesTests:com.android.server.am.BatteryExternalStatsWorkerTest FrameworksServicesTests:com.android.server.am.MeasuredEnergySnapshotTest FrameworksServicesTests:com.android.server.am.BatteryStatsServiceTest FrameworksCoreTests:com.android.internal.os.BatteryStatsTests

Tests that currently fail are marked to be skipped;
they should be addressed by b/180015146.
This is accomplished by introducing a new annotation, @SkipPresubmit.

Test: treehugger presubmit
Bug: 180016384
Change-Id: If01beaa342468aeded660e5766a14391d3ee9bcc