Fix instrumented tests

[mzorz]

Comes from https://github.com/Automattic/simplenote-android/pull/1733/files#r2253935365

2. Warning (⚠️): In addition to having unit test working, let's consider having instrumented tests working as well, in this or another follow-up PR (if not too much of a trouble). On that side of things I have the following:
   1. First, we need to add this androidTestImplementation 'androidx.test.uiautomator:uiautomator:2.3.0' dependency to have those instrumented tests compile.
   2. Then, we need to use ./gradlew Simplenote:connectedDebugAndroidTest over ./gradlew connectedDebugAndroidTest to make them run, because otherwise compilation fails on the PasscodeLock module with multiple duplicate class failures on Kotlin (we might consider getting to the bottom of this).
   3. Finally, after managing to run instrumented tests successfully, you'll find that at least 13/74 fail.

[dangermattic]

Thanks for reporting! 👍