Convert ShadeTouchHandlerTest to Kotlin

Converting in preparation of adding a new dependency on
CommunalSettingsInteractor. Also upgraded to mockito-kotlin.

Bug: 351058701
Test: atest ShadeTouchHandlerTest
Flag: EXEMPT just converting test to Kotlin
Change-Id: I20618f35a8cf435ea6e347a8d3473b8725c6b55d
2 files changed