Add CursorWindow perf tests

Test: adb install -r $OUT/data/app/CorePerfTests/CorePerfTests.apk && adb shell cmd package compile -m speed -f com.android.perftests.core && adb shell am instrument -w -e class android.database.CursorWindowPerfTest com.android.perftests.core/android.support.test.runner.AndroidJUnitRunner

Change-Id: Ie4b128ad8c6bca08be7bf2b4fb0f9db3c7aa3288