MediaPreparer: Restore support for media-download-only mode

CtsMediaBitstreamsTestCases uses media-download-only mode.
Because MediaPrepared ignored media-download-only flag,
it was trying to get maximum resoution which required
CtsMediaStressTestCases.dynamic file to be pushed to the device.
This caused an issue when running CtsMediaBitstreamsTestCases.

Bug: 246906519
Test: atest --no-bazel-mode \
 com.android.compatibility.common.tradefed.targetprep.MediaPreparerTest
Test: atest CtsMediaBitstreamsTestCases

Change-Id: Id89e2ed315c76737f09ec78fcd78691c1542d6e1
2 files changed
tree: c1b5bc6f24f8434c701057ed6440f7c24c10d956
  1. common/
  2. OWNERS
  3. PREUPLOAD.cfg