Update Android.mk for amlogic

Update Android.mk for amlogic

This adds a separate app-linkable libminigbm target that disables
the gralloc code and links in the gbm api. Adds support for meson
buildflag.

Bug: b/76099793
Test: amlogic test tool, drawframe
Change-Id: I7aba3ec65fa39cabbb8c96c44d6d59b8225956a9
Reviewed-on: https://chromium-review.googlesource.com/998758
Commit-Ready: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Alistair Strachan <astrachan@google.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>