Update FrameMetricsReporterTests to test that we don't report any frames when...

Update FrameMetricsReporterTests to test that we don't report any frames when fromFrame is not explicitly set

Makes sure bugs where we forget to explicitly set the fromFrame are easier to catch

Test: mmm -j8 frameworks/base/libs/hwui && adb push /data/nativetest/hwui_unit_tests/hwui_unit_tests /data/nativetest/hwui_unit_tests/hwui_unit_tests && adb shell /data/nativetest/hwui_unit_tests/hwui_unit_tests --gtest_filter='FrameMetricsReporter.*'
Change-Id: I477525731cc6f698f904fc4b31da0fae2cc45ab8