Revert "klte-common: add Dex-preoptimization flags"

* I don't know what the hell these do yet....

This reverts commit 2453bfa2e0e51b62f47c3734acebd3c8a3abc81b.
klte-common: move NFC HAL to device specific trees

* With the introduction of Android 5.0 the NFC HAL name is based on the
chipset it is using. Thus move this up a repo and define in the device
specific repos.

Change-Id: Ibcf7a77b8bf965ac8c4ca3306036186131e83d9a
klte-common: add back support for hardware keys

Change-Id: Id30f8f3ed2576c602fe904699d40d72ef97e2e3a
klte-common: enable multiple users

Change-Id: I9223ceeac3f0bde79e175446b08f09b8754ae337
klte-common: set long-press on HOME key to search assistant

* We already have a "recents" key so it would be redundant to default to
that again for long-press on HOME

Change-Id: Ie05c1ce2bfdab21ec9982c9ea959eb2295c2907c
klte-common: update fstab

* There were some errors in th log about usb mounting

Change-Id: I15d9f6cbfcf1ba3b489570934276b1174af56065