Test: Remove unnecessary ui automator dependency

This also fixes the below 'AndroidX' related warning with
'android.enableJetifier=true'. This behavior will not be allowed in
Android Gradle plugin 8.0.

------------------------------------------------------------------------

WARNING:Your project has set `android.useAndroidX=true`, but
configuration `:WordPressUtils:debugAndroidTestRuntimeClasspath` still
contains legacy support libraries, which may cause runtime issues.
This behavior will not be allowed in Android Gradle plugin 8.0.
Please use only AndroidX dependencies or set
`android.enableJetifier=true` in the `gradle.properties` file to migrate
your project to AndroidX (see https://developer.android.com/jetpack/
androidx/migrate for more info).
The following legacy support libraries are detected:
:WordPressUtils:debugAndroidTestRuntimeClasspath ->
com.android.support.test.uiautomator:uiautomator-v18:2.1.2

------------------------------------------------------------------------

Author: ParaskP7

WordPressUtils/build.gradle

@@ -30,7 +30,6 @@ dependencies {
     androidTestImplementation "androidx.test:runner:$androidxTestCoreVersion"
     androidTestImplementation "androidx.test:rules:$androidxTestCoreVersion"
     androidTestImplementation "androidx.test.ext:junit:$jUnitExtVersion"
-    androidTestImplementation "com.android.support.test.uiautomator:uiautomator-v18:$uiAutomatorVersion"
 }
 
 android {

build.gradle

@@ -54,5 +54,4 @@ ext {
 
     // android test
     jUnitExtVersion = '1.1.3'
-    uiAutomatorVersion = '2.1.2'
 }