Reorganize existing files to test(s) that use the

Move existing mediastress content into a subdirectory
Bug: 170239993
Test: manual

Change-Id: I1656443e9c9f61ec91bda1e3471e0f6dd878696d
92 files changed
tree: 7a7fac74a95d4c67460ccb0096751596cade905b
  1. cts/