Remove AOSP QCOM media branches

* New direct path mappings allow all variants to share this.

Change-Id: I54faf6890cbdff310d4f86f38cb493477dd5307f
android-5.0.0_r6 -> android-5.0.0_r7

*Import Qualcomm SELinux policy by default
*Use chromium_org from CM repos

Change-Id: Ib166751f1a8e0825af80c0fc99d6b01ef2d04f35
Track cm's telecom

Change-Id: I32a6656cccd2a4cb47d69cd9c30a0696b571e99f