common_mobile: Don't forcibly ship optional AOSP packages

This was added in commit 89269908 for no apparent reason. Let's not
forcibly include these packages in every build, because most phones
already inherit from AOSP's full_base_telephony.mk anyway.

Change-Id: Ib7986b7f7edd58a7043c793e6ba566d3dcf5a2a6