Migrate more mainline-hosted code into module directory

codec registrant (swcodec), minijail, and transcoding services

Note that a couple of the Android.bp files needed tweaks since
the license clauses pointed to no-longer-visible modules. These
will be re-generated automatically.

Bug: 245354160
Test: build and boot
Change-Id: I021a3f8f2bcd628d130895874cf470d58ebe568b