Commit b554e59 converted the build rules of contexts to Soong.
Previously, both services_contexts and hwservice_contexts were stripped
of comments. This is useful as a CTS test (testAospServiceContexts)
ensures that the device service_contexts matches AOSP. Restore the
previous behaviour.
Bug: 279384270
Test: m selinux_policy; diff plat_service_contexts; no more comments
(cherry picked from https://android-review.googlesource.com/q/commit:74482f5328484f143ab9a6135a01039a94230336)
Merged-In: Id0245efacf4e4b123f805869d95bacf804ccb915
Change-Id: Id0245efacf4e4b123f805869d95bacf804ccb915
0734dbcfa9