Prefill the cache before trying to instantiate the media extractor.

The latter is an operation that otherwise could block on the datasource
for a significant amount of time. During that time we'd be unable to
abort the preparation phase without this prefill.

Change-Id: Ia42496d88a11314386ea8797d665bf4e94871e30
related-to-bug: 3362836
2 files changed
tree: 7bc60e7bca5d17cad542d96782ad828a0df0c258
  1. camera/
  2. cmds/
  3. drm/
  4. include/
  5. media/
  6. services/