Merge "Move statsd related hidden API flag file entries to...

Merge "Move statsd related hidden API flag file entries to packages/modules/Statsd" am: 42bdea36 am: 40d7e0b9 am: 853fee30 am: 870bbf85

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1747693

Change-Id: Ie6870d1bf179fb12cd3be4b81b94a8f46f8d89da