Delete mController when eventHub device is going away

When an event hub device is going away, the controller associated with
it should be deleted.

Before this CL, mController would remain, and its use would result in an
illegal memory access, because it was storing a reference to a deleted

Bug: 245770596
Test: atest inputflinger_tests:InputDeviceTest#DumpDoesNotCrash
Merged-In: I298f43172472f74fa4d5d8e0b7f52bd5c13d14f7
Change-Id: I298f43172472f74fa4d5d8e0b7f52bd5c13d14f7
(cherry picked from commit 30feb8c162aa2e5348bba20e99e8db2a61bac6e7)
5 files changed