media/libraries
tonihei 627b7a3e56 Add media button preferences
This adds the API surface for media button preferences in MediaSession
and MediaController. It closely mimics the existing custom layout
infrastructure (which it will replace eventually).

Compat logic:
 - Session:
     - When converting to platform custom actions, prefer to use
       media button preferences if both are set.
     - When connecting to an older Media3 controller, send the
       media button preferences as custom layout instead.
 - Controller:
     - Maintain a single resolved media button preferences field.
     - For Media3 controller receiving both values, prefer media
       button preferences over custom layouts.

Missing functionality:
 - The conversion from/to custom layout and platform custom actions
   does not take the slot preferences into account yet.

PiperOrigin-RevId: 686950100
2024-10-17 09:54:36 -07:00
..
2024-09-18 04:47:39 -07:00
2024-08-07 12:28:25 -07:00
2024-10-17 09:54:36 -07:00