Add CollectionUtilsTest

Bug: 274702991

For R coverage calculation:
Expect to remove 5 lines and add 10 lines of coverage

Test: COllectionUtilsTest
Change-Id: I1a1730bd97ac867c3e8ee7fc02e539218d0b5f91

1 files changed, 0 insertions, 25 deletions

diff --git a/PermissionController/src/com/android/permissioncontroller/permission/utils/CollectionUtils.java b/PermissionController/src/com/android/permissioncontroller/permission/utils/CollectionUtils.java
index 6f2a3079d..108120ced 100644
--- a/PermissionController/src/com/android/permissioncontroller/permission/utils/CollectionUtils.java
+++ b/PermissionController/src/com/android/permissioncontroller/permission/utils/CollectionUtils.java
@@ -16,8 +16,6 @@
 
 package com.android.permissioncontroller.permission.utils;
 
-import android.util.ArraySet;
-
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
@@ -59,29 +57,6 @@ public final class CollectionUtils {
     }
 
     /**
-     * Remove all values in the array set that do <b>not</b> exist in the given collection.
-     *
-     * @param <T> the class of the elements to retain and of the {@code ArraySet}
-     * @param arraySet the {@code ArraySet} whose elements are to be removed or retained
-     * @param valuesToRetain the values to be used to determine which elements to retain
-     *
-     * @return {@code true} if any values were removed from the array set, {@code false} otherwise.
-     *
-     * @see ArraySet#retainAll(java.util.Collection)
-     */
-    @SafeVarargs
-    public static <T> boolean retainAll(ArraySet<T> arraySet, T... valuesToRetain) {
-        boolean removed = false;
-        for (int i = arraySet.size() - 1; i >= 0; i--) {
-            if (!ArrayUtils.contains(valuesToRetain, arraySet.valueAt(i))) {
-                arraySet.removeAt(i);
-                removed = true;
-            }
-        }
-        return removed;
-    }
-
-    /**
      * Return a singleton list containing the element, or an empty list if the element is
      * {@code null}.
      *