Delete InputFlingerService_test

This test currently has 2 test cases:
1) sends an inputchannel via binder and then asks for it back. This is
   just implementation of the service, so it's just testing the
   implementation.
2) checks that an fd that's sent over binder remains non-blocking. A
   similar test was already committed into binderLibTest as
   aosp/2239719. This is general binder behaviour, and it's better if it
   lives next to the binder stuff. We don't need this test in input.
Therefore, delete this test. It's causing some crashes on hwasan devices
when libinput is linked statically, and the setup is too complicated to
get correctly (and the setup is already done for us in binderLibTest).

Bug: 217165277
Test: atest --host --no-bazel-mode inputflinger_tests libinput_tests
Change-Id: Iff9970465018e2a9ba73377c3332e014c870e160