Cherry pick from https://googleplex-android-review.git.corp.google.com/#/c/398226/
This adds an integer to the descriptor of devices without uniqely
identifying information. It will reuse values that are no longer
in use, so if you remove a single device and attach a different
identical device it will appear to be the same device.
TODO: Derive uniqueness from USB port when possible. This version
will generate different descriptors for each half of a USB keyboard
that shows up twice.
Change-Id: Ie628f19c01469f6ec2d354cd00000898ac6432fa
Some devices have joystick axes or DPad keys, but no gamepad buttons
(or vice versa). We shouldn't count these as gamepads since games
can't really be expected to work with this setup in the general case.
Instead, require that a device has a movement mechanism (joystick
axes or DPad buttons), as well as at least one gamepad button before
considering it a controller.
Bug: 13432364
Change-Id: Ia113c8441557d4c858c1e5740a3e1c7e0e9fdcdd
Refactored the directory structure so that services can be optionally
excluded. This is step 1. Will be followed by another change that makes
it possible to remove services from the build.
Change-Id: Ideacedfd34b5e213217ad3ff4ebb21c4a8e73f85
