Attempt at updating the GaugeManagerTests

Author: tejasd

firebase-perf/src/main/java/com/google/firebase/perf/session/SessionManager.java

@@ -173,7 +173,7 @@ public void unregisterForSessionUpdates(WeakReference<SessionAwareObject> client
 
   private void startOrStopCollectingGauges() {
     if (perfSession.isGaugeAndEventCollectionEnabled()) {
-      gaugeManager.startCollectingGauges(perfSession);
+      gaugeManager.startCollectingGaugeMetrics(perfSession);
     } else {
       gaugeManager.stopCollectingGauges();
     }

firebase-perf/src/main/java/com/google/firebase/perf/session/gauges/GaugeManager.java

@@ -162,7 +162,7 @@ public void updateGaugeCollection(ApplicationProcessState applicationProcessStat
    * @note: This method is NOT thread safe - {@link this.startCollectingGauges()} and {@link
    *     this.stopCollectingGauges()} should always be called from the same thread.
    */
-  public void startCollectingGauges(PerfSession session) {
+  public void startCollectingGaugeMetrics(PerfSession session) {
     if (this.session != null) {
       stopCollectingGauges();
     }

firebase-perf/src/test/java/com/google/firebase/perf/session/SessionManagerTest.java

@@ -144,7 +144,7 @@ public void testUpdatePerfSessionStartsCollectingGaugesIfSessionIsVerbose() {
     testSessionManager.setApplicationContext(mockApplicationContext);
 
     verify(mockGaugeManager, times(1)).initializeGaugeMetadataManager(mockApplicationContext);
-    verify(mockGaugeManager, times(1)).startCollectingGauges(newSession);
+    verify(mockGaugeManager, times(1)).startCollectingGaugeMetrics(newSession);
   }
 
   @Test