Added getDefaultAccountForNewContacts and
setDefaultAccountForNewContacts APIs

Bug: 352313110,364637693
Test: added new test (atest CtsContactsProviderTestCases:ContactsContract_DefaultAccountTest)
Flag: android.provider.new_default_account_api_enabled

	modified:   core/api/current.txt
	modified:   core/api/system-current.txt
	modified:   core/java/android/provider/ContactsContract.java

Change-Id: I0893e2d0dcd3175677ce9478e351044813295011
3 files changed