fix(android): Update PerformanceStatsImpl.java

Fixed typo in function calls

Author: ccoltos

android/src/main/java/nl/skillnation/perfstats/PerformanceStatsImpl.java

@@ -91,8 +91,8 @@ public void run() {
             // Collect FPS info
             mTotalFramesDropped += mFrameCallback.getExpectedNumFrames() - mFrameCallback.getNumFrames();
             mTotal4PlusFrameStutters += mFrameCallback.get4PlusFrameStutters();
-            double fps = mFrameCallback.getFPS();
-            double jsFps = mFrameCallback.getJSFPS();
+            double fps = mFrameCallback.getFps();
+            double jsFps = mFrameCallback.getJsFPS();
 
             // Collect system resource usage
             double cpuUsage = 0;