Add check-vintf-all target.

Add target that checks VINTF compatibility of the current build
(in $PRODUCT_OUT) properly. The target:

- Doesn't require a full build
- Won't run for system-only AOSP targets

A verbose log is printed if `m check-vintf-compatible` is executed,
but it won't show up if `m` is executed.

(After this patch, adding product / system_ext matrices is as simple
as defining a vintf_compatibility_matrix in Soong, and VINTF
compatibility is properly checked.)

Test: m check-vintf-all
Test: delete */etc/vintf and m check-vintf-all
Test: m
Test: m check-vintf-all on device with vendor/odm and ODM SKU-specific
      manifests

Test: change manifest.xml to be incompatible and m check-vintf-all fails

Bug: 140280874
Bug: 140360109

Change-Id: I6ee79910d745d29cfc9b05b1435e26f91b7c10f7