Use device_suggestion_container instead of device_suggestion_button as the...

Use device_suggestion_container instead of device_suggestion_button as the clickable surface for device suggestions button in UMO

Scanner screenshots at: https://drive.google.com/drive/folders/1Az1wjhhWn0jQa613jivbbLZUXNKs-I7x?usp=sharing

Bug: b/416220762
Test: Local test with Accessibility Scanner, atest MediaControlPanelTest
Flag: com.android.media.flags.enable_suggested_device_api
Change-Id: I1ffea25e7f5ff291524c3a00eda57d098dc9d18a