Rename PersistentCacheManager to PersistentCacheIndexManager

Author: cherylEnkidu

firebase-firestore/src/main/java/com/google/firebase/firestore/FirebaseFirestore.java

@@ -105,7 +105,7 @@ public interface InstanceRegistry {
   private volatile FirestoreClient client;
   private final GrpcMetadataProvider metadataProvider;
 
-  @Nullable private PersistentCacheManager persistentCacheManager;
+  @Nullable private PersistentCacheIndexManager persistentCacheIndexManager;
 
   @NonNull
   private static FirebaseApp getDefaultFirebaseApp() {
@@ -407,16 +407,16 @@ public Task<Void> setIndexConfiguration(@NonNull String json) {
   /** @hide */
   @RestrictTo(RestrictTo.Scope.LIBRARY)
   @Nullable
-  public PersistentCacheManager getPersistentCacheIndexManager() {
+  public PersistentCacheIndexManager getPersistentCacheIndexManager() {
     ensureClientConfigured();
-    if (persistentCacheManager != null) {
-      return persistentCacheManager;
+    if (persistentCacheIndexManager != null) {
+      return persistentCacheIndexManager;
     }
     if (settings.isPersistenceEnabled()
         || settings.getCacheSettings() instanceof PersistentCacheSettings) {
-      persistentCacheManager = new PersistentCacheManager(client);
+      persistentCacheIndexManager = new PersistentCacheIndexManager(client);
     }
-    return persistentCacheManager;
+    return persistentCacheIndexManager;
   }
 
   /**

firebase-firestore/src/main/java/com/google/firebase/firestore/PersistentCacheManager.java renamed to firebase-firestore/src/main/java/com/google/firebase/firestore/PersistentCacheIndexManager.java

@@ -21,11 +21,11 @@
 // TODO(csi): Remove the `hide` and scope annotations.
 /** @hide */
 @RestrictTo(RestrictTo.Scope.LIBRARY)
-public class PersistentCacheManager {
+public class PersistentCacheIndexManager {
   @NonNull private FirestoreClient client;
 
   @RestrictTo(RestrictTo.Scope.LIBRARY)
-  public PersistentCacheManager(FirestoreClient client) {
+  public PersistentCacheIndexManager(FirestoreClient client) {
     this.client = client;
   }