Fix SDLLockScreenActivityEspressoTest for newer devices

[JulianKast]

Fixes #1876

This PR is [ready] for review.

Risk

This PR makes [major] API changes.

Testing Plan

• I have verified that I have not introduced new warnings in this PR (or explain why below)
• I have run the unit tests with this PR
• I have tested this PR against Core and verified behavior (if applicable, if not applicable, explain why below).
• I have tested Android, Java SE, and Java EE

Unit Tests

All unit test were ran with this PR

Core Tests

i ran some basic test due to gradle changes connecting to a sync 3 tdk via Bluetooth and AOA

Core version / branch / commit hash / module tested against: Sync 3
HMI name / version / branch / commit hash / module tested against: Sync 3

Summary

This PR fixes an issue where SDLLockScreenActivityEspressoTest don't work on newer versions of android.

Changelog

Breaking Changes

• To get the Espresso test to work, we had to update mockito dependencies, which forced us to update sourceCompatibility and targetCompatibility to JavaVersion.VERSION_1_8. It is highly unlikely that there are apps out there they have not already updated to at least Android 1.8 already.

Bug Fixes

• Fix SDLLockScreenActivityEspressoTest test for newer devices

CLA

• I have signed the CLA