Revert "Reuse license metadata files from Soong"

Revert "Escape Host*Variable contents"

Revert submission 1899703

Reason for revert: b/210158272
Reverted Changes:
I142c19284:Reuse license metadata files from Soong
Ife89b8f23:Add dependency license annotations
I8e7410837:Build license metadata files in Soong

Change-Id: Id9d66c01453aebe8a52eaa6628e9933a990d4c2f