Extra VNDKs are now installed under /system_ext in APEX format with
a phony target "vndk_apex_snapshot_package".
There are still files remained in /system/etc(*.libraries.<VER>.txt)
which are installed with "vndk_snapshot_packages".
These files are already packaged into VNDK APEXes, but linkerconfig and
libnativeloader still use them from /system/etc.(b/145184886)
Bug: 137802149
Test: lunch aosp_arm64
&& flash system.img on Q device
&& boot
Change-Id: I94c340d6f1c1af6ab1ae93c22b0a98fd4c10262e
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
