Update uiautomator references in frameworks/base/packages/Shell/tests

* Remove unused dependencies.
* Replace "ub-uiautomator" (v2.2.0) with
  "androidx.test.uiautomator_uiautomator" (v2.3.0).

Bug: 235842600
Test: presubmit
Change-Id: Ib4b00278de42da7cc58b4fc024634109de6d87de
diff --git a/packages/Shell/tests/Android.bp b/packages/Shell/tests/Android.bp
index 70e8c10..0dc3314 100644
--- a/packages/Shell/tests/Android.bp
+++ b/packages/Shell/tests/Android.bp
@@ -18,7 +18,7 @@
     static_libs: [
         "androidx.test.rules",
         "mockito-target-minus-junit4",
-        "ub-uiautomator",
+        "androidx.test.uiautomator_uiautomator",
         "junit",
     ],
     platform_apis: true,