Convert trace_config_multi_user.textproto to soong

Move the module from platform_testing/scripts/perfetto-setup/Android.mk
to this location to make it more reasonable that the source is just next
to the module itself.

Bug: 343141986
Test: m trace_config_multi_user.textproto
Change-Id: I53b2df2fc581cfcc765d49256a8f3a7e4cb8c80f