klte-common: remove S-Pen permissions since we don't support it

Change-Id: Ifedad7e0030b60ac369ddcd18cfc9d91d7428d12
(cherry picked from commit 9275973bd9619b68063a9e067b61398c41a1ae69)
Revert "klte-common: set voice wakeup to 1"

This reverts commit 5c2b77218cce65643369f8079b4ef6851941428d.

(cherry picked from commit 7e0db6d8ef4cd92835c983f2d1d08049c2f99275)
klte-common: disable av offload playback

Change-Id: Iadd878e59261b7c991a3645fadf091f82200e5dd
(cherry picked from commit c70c77af28f30be363259c30abdf24ab141619de)
klte-common: add PowerHAL extension for gpio-keys.

* This should have been here all along. This is how its done in hlte. we
actually had this in at one point but it got removed by mistake during
bringup. Permissions also updated accordingly.

Change-Id: I774e48103e392bb10c4c565995f8ab7476b91abe
(cherry picked from commit ecbb28387cf84311a3687ee93950f78e6f0305b7)
klte-common: add volume buttons to the allowed list of wakeup keys.

* The volume keys would over time no longer function for waking the device
even if it was enabled in settings.

Change-Id: I827a67b6aaf8f19c898ab0678eb7913542dfad25
(cherry picked from commit 75b3f024dbdb7a82be53a38c7f0e0af6654b971f)