vendor: Add back soong and build configuration for qcom platform

Revert "Revert "vendor: Add qcom platform type to soongs vars""

This reverts commit 1ce7639d22251664e95c41c709822c54d7d647f0.

Revert "Revert "vendor: Add special conditions for devices with prebuilt display hal""

This reverts commit e3e12b0e5f6beea05ac120d0af130cda0961e825.

Change-Id: I0ca36cbd79cb567889dfd7062eeb9eb4109bb4c3
5 files changed