adb: remove fdevent_install, fdevent_remove.

Remove fdevent_install and fdevent_remove in favor of using
fdevent_create and fdevent_destroy, so that we can put RAII types (i.e.
unique_fd) into fdevent without worrying about -Wexit-time-destructors
or structs that are freed instead of deleted.

Bug: http://b/79786774
Test: python test_device.py
Change-Id: I8471cc00574ed492fe1b196944976cdaae8b7cff