t6-common: Add missing DRM proprietary files

* Add missing qseecomd service
* Add missing Widevine libraries
* Group tzapps firmware with Widevine

Change-Id: I98a341788f9df14e0ed2c66bc871ac7b11293458
t6-common: FM Radio support

*FM for t6 and t6spr. T6vzw has FM hardware disabled.
*Delete uneeded qcom script.
*Correct audio routes needed for FM Radio.
*Some extra blocks in ueventd.

Change-Id: I1db45b220ac7b2ac19058cf3db098354c5302455
t6-common: camera: Update HAL API versions and fix warnings

Change-Id: I41c5a9ac293e055c3a7b9ab6f1c0b34fa2655715