Enable coexistable device policy APIs for non-EMM management

Make DPM.getRequiredPasswordComplexity fully coexistable.

Bug: 335624297
Test: PasswordComplexityTest
      PasswordTest
      ManagedProfilePasswordTest
      FrameworksServicesTests:DevicePolicyManagerTest

Change-Id: I6e8ad8ee3389c9f779f6f04e859a0f22d5fbac29
11 files changed