Convert BouncerSwipeTouchHandler and ShadeTouchHandler to Kotlin.

This changelist converts these two TouchHandlers to Kotlin for future
work.

Bug: 340177049
Flag: EXEMPT refactor
Test: atest ShadeTouchHandlerTest
Test: atest BouncerSwipeTouchHandlerTest
Change-Id: If52d5541a91dfd32e0592ca8753f351b5797278e
4 files changed