Move LogicUtils to 'util' directory.

Author: ehsannas

firebase-firestore/src/main/java/com/google/firebase/firestore/local/SQLiteIndexManager.java

@@ -31,7 +31,6 @@
 import com.google.firebase.firestore.core.CompositeFilter;
 import com.google.firebase.firestore.core.FieldFilter;
 import com.google.firebase.firestore.core.Filter;
-import com.google.firebase.firestore.core.LogicUtils;
 import com.google.firebase.firestore.core.Target;
 import com.google.firebase.firestore.index.DirectionalIndexByteEncoder;
 import com.google.firebase.firestore.index.FirestoreIndexValueWriter;
@@ -45,6 +44,7 @@
 import com.google.firebase.firestore.model.SnapshotVersion;
 import com.google.firebase.firestore.model.TargetIndexMatcher;
 import com.google.firebase.firestore.util.Logger;
+import com.google.firebase.firestore.util.LogicUtils;
 import com.google.firestore.admin.v1.Index;
 import com.google.firestore.v1.StructuredQuery;
 import com.google.firestore.v1.Value;

firebase-firestore/src/main/java/com/google/firebase/firestore/core/LogicUtils.java renamed to firebase-firestore/src/main/java/com/google/firebase/firestore/util/LogicUtils.java

@@ -1,5 +1,7 @@
-package com.google.firebase.firestore.core;
+package com.google.firebase.firestore.util;
 
+import com.google.firebase.firestore.core.CompositeFilter;
+import com.google.firebase.firestore.core.Filter;
 import java.util.Collections;
 import java.util.List;