ANDROID: GKI: drivers: usb: Add functions usb_func_ep_queue/usb_func_wakeup

This is required to reduce the ABI diff.

Test: build
Bug: 151977927

Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Change-Id: I253e43066a3cd9c8293e46a5f17ef0cfe002cffe
(cherry picked from commit d6c40da2)
[hridya: amended commit to only include the ABI diff,
EXPORT_SYMBOL -> EXPORT_SYMBOL_GPL, add some pointer checks,
documentation]
[mkbestas]: Reapply after this got missed in between the merges somehow
Signed-off-by: Hridya Valsaraju <hridya@google.com>