Update framework-base-testutils to use new mockito

Update framework-base-testutils to use
mockito-target-extended-minus-junit4 instead of
mockito-target-minus-junit4 to allow tests to take advantage of the new
static and final method mocking capabilities.

Bug: 187755981
Test: build
Change-Id: Ie0e4da02b7263cb6a89d91aeaa7230f3e932c4f2

tests/utils/testutils/Android.bp

@@ -38,6 +38,6 @@ java_library {
         "android.test.runner",
         "android.test.base",
         "android.test.mock",
-        "mockito-target-minus-junit4",
+        "mockito-target-extended-minus-junit4",
     ],
 }