m7-common: remove HTC IR implementation

* Kitkat brings a real IR HAL. Let's use that instead.
  Also, HTC's IR libs don't OAT.
* Squash of the following commits:

Revert "m7-common: declare CIRModule.apk as pre-signed"

This reverts commit 547913be937a4aa82afc2ec4113fa85e59cf486d.

Revert "m7-common: HTC IR Blaster support for AOSP"

This reverts commit e498ba5e63e337705da1390790c4d583ef2a0d72.

Change-Id: Ie2fda44c8e18377544485df9f037f9ffbd232d4d
m7-common: add I420colorconvert and mm-color-convertor

Change-Id: I666ba8c350616b9c82df2477f4cb6f9492fa3576