The default packages for system_ext partition must be added to
*_system_ext.mk.
We have empty list for now, but will update the files soon.
Bug: 134359158
Bug: 139053989
Test: build and boot
Change-Id: I78c85c3a9ff0437906143c2d4982ecfb0e4d058d
So far, we have *_system.mk and *_vendor.mk.
This patch split all product settings from *_vendor.mk to new
*_product.mk
This patch also create a new telephony.mk to include all
telephony_*.mk
Bug: 119747870
Test: lunch mainline_arm64-user; make -j
Test: compare the content with and without the patch
Test: the output files in out folder are the same
Change-Id: I79aefdd1971b3b5724a3ec858de4109b645c765a
Merged-In: I79aefdd1971b3b5724a3ec858de4109b645c765a
