Previously we have two AppFuseTest class in the normal test and the perf
test. The CL renames the one in the perf test to different name.
Bug: 31982374
Test: adb shell am instrument -w com.android.mtp.perftests/android.support.test.runner.AndroidJUnitRunner
Change-Id: I6272d7f78cead0bfeee7cf83ed50c77658caa1c0