Cherry pick PR #4047: Add media_support_internal to media_util gn tar…

…get (#4053)

Refer to the original PR: youtube/cobalt#4047

It was missing.  It didn't cause any build issues as it's a header file.

Also removed media_is_audio_supported.cc, media_is_supported.cc, and
media_is_video_supported.cc from stub/BUILD.gn. They are not
implementing any Starboard interfaces (e.g. MediaIsAudioSupported() is
internal interface, not exposed to Cobalt) and shouldn't be included in
stub/BUILD.gn.

b/361864042

---------

Co-authored-by: xiaomings <[email protected]>

starboard/shared/starboard/media/BUILD.gn

@@ -21,6 +21,7 @@ static_library("media_util") {
     "//starboard/shared/starboard/media/codec_util.h",
     "//starboard/shared/starboard/media/key_system_supportability_cache.cc",
     "//starboard/shared/starboard/media/key_system_supportability_cache.h",
+    "//starboard/shared/starboard/media/media_support_internal.h",
     "//starboard/shared/starboard/media/media_util.cc",
     "//starboard/shared/starboard/media/media_util.h",
     "//starboard/shared/starboard/media/mime_supportability_cache.cc",

starboard/stub/BUILD.gn

@@ -115,11 +115,8 @@ static_library("stub_sources") {
     "//starboard/shared/stub/media_get_max_buffer_capacity.cc",
     "//starboard/shared/stub/media_get_progressive_buffer_budget.cc",
     "//starboard/shared/stub/media_get_video_buffer_budget.cc",
-    "//starboard/shared/stub/media_is_audio_supported.cc",
     "//starboard/shared/stub/media_is_buffer_pool_allocate_on_demand.cc",
     "//starboard/shared/stub/media_is_buffer_using_memory_pool.cc",
-    "//starboard/shared/stub/media_is_supported.cc",
-    "//starboard/shared/stub/media_is_video_supported.cc",
     "//starboard/shared/stub/media_set_audio_write_duration.cc",
     "//starboard/shared/stub/memory_allocate_aligned_unchecked.cc",
     "//starboard/shared/stub/memory_allocate_unchecked.cc",