ANDROID: GKI: Enable CONFIG_BT_HIDP as it is needed by some platforms

Might as well build it in so we don't have to worry about ABI issues
over time.

Bug: 157965270
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I285bf3e3bf4bb9c649c3ac667834c6d12c7e1f4a