Move out IntegrityCheckResult related methods from AppIntegrityManagerServiceImpl and provide unit tests for IntegrityCheckResult.

Bug: 147095027
Test: atest frameworks/base/services/tests/servicetests/src/com/android/server/integrity/model/IntegrityCheckResultTest.java
Change-Id: I4bcd7fe1284515a2483ae4be77d6d17c7fcbcc36
3 files changed