Add performance test for Debug.getPss()

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

Change-Id: Ia8cacb86c14b9956c9d526195d90848c678da6a6
1 file changed