Add Grant/Revoke tests

Add tests for the KotlinUtils grant/revoke methods

Test: atest GrantRevokeTests, or
m GooglePermissionControllerUnitTests && adb install ~/InternalMaster/out/target/product/blueline/testcases/GooglePermissionControllerUnitTests/arm64/GooglePermissionControllerUnitTests.apk && adb shell am instrument -w com.google.android.permissioncontroller.tests.unit && adb uninstall com.google.android.permissioncontroller.tests.unit

Change-Id: Ic421027f911a2a166a42dd64d06db0c86e268e9a