frameworks/base: Add Elecom gamepad support

This CL adds support for the Elecom JC-U4113S gamepad.
Both when it is in X mode as well in D mode.

Bug: 160266876
Test: Manually tested. Launched "Gamepad Tester" APK.
      Verified the mappings both in D mode and X mode were correct.
Change-Id: I5f3f7e86e21fa05b9e2fed9b5a857d04a9d556e6
(cherry picked from commit a68571fe5d4e24a1aae60bf68eac7be0f34d6593)