Refactoring

[Sonderful]

• DiscoveryActivity is unreachable for a normal user of the app. It seems to have been untouched for two years. Removing for now, easy to revive if someone still needs it.
• Also removing the location permission that was required for beacons. Missed in previous commits.
• Many dependencies were out of date, so I updated them.
• Several dependencies were unused (palette library).
• Unit test dependencies were JUnit 4, switched to JUnit 5 and MockK for Kotlin, instead of Mockito.
• Removed Powermock, which was completely unnecessary for mocking the android.util.Log class.
• Removed example unit test class.

[bd0n4lds]

There is an Invalided context in activity_display.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="mycroft.ai.wear.MycroftDisplayActivity"
tools:deviceIds="wear">