Add Permission performance tests

Test: m CorePerfTests
Test: adb install CorePerfTests.apk
Test: adb shell am instrument -w -e class android.os.PermissionTest \
com.android.perftests.core/android.support.test.runner.AndroidJUnitRunner

Change-Id: Iad7b6c1d110c9188c51712925a4d9ffa7d46120e