StatsLog BleScanResults moved out of BatteryStats

Move the StatsLog.write for BleScanResults to AppScanStats, out of
BatteryStatsImpl.

Bug: 80308558
Test: cts-tradefed run cts-dev -m CtsStatsdHostTestCases -t android.cts.statsd.atom.UidAtomTests#testBleScanResult
Change-Id: Ia58205bc6d8dea6854894a119a8f676668078ec8
Merged-In: Ia4c0882f024710699c55e182fedf747c0bdd3c8d