Logtags for com.android.server.policy

The definitions for event log tags are currently in system/core. Instead
of keeping them there, reserve a range for these event tags and move
them into com.android.server.policy.

Currently it is only used by PhoneWindowManager.

Bug: 128933363
Test: build only
Change-Id: Ida903499e9af8650299e3965787b4ac966b66915
Merged-In: Ida903499e9af8650299e3965787b4ac966b66915