Add flag com.android.bluetooth.flags.map_mime_multipart to trunk_staging.

This change was automatically created by advancing the Gantry workflow at:
https://releasetracker.partner.android.com/changes/bcf3t9q000001?build_unique_id=com.android.bluetooth.flags.map_mime_multipart-platform
Do not edit this file manually or revert this change - use the Gantry workflow to manage the state of this flag.

Bug: 424374330
Flag: com.android.bluetooth.flags.map_mime_multipart
Ignore-AOSP-First: AConfig change for future AOSP release
Change-Id: I0c446ee3be24d71152f61c90beee42d400631b8f

aconfig/trunk_staging/com.android.bluetooth.flags/map_mime_multipart_flag_values.textproto

diff --git a/aconfig/trunk_staging/com.android.bluetooth.flags/map_mime_multipart_flag_values.textproto b/aconfig/trunk_staging/com.android.bluetooth.flags/map_mime_multipart_flag_values.textproto
new file mode 100644
index 0000000..9b7664d
--- /dev/null
+++ b/aconfig/trunk_staging/com.android.bluetooth.flags/map_mime_multipart_flag_values.textproto
@@ -0,0 +1,6 @@
+flag_value {
+  package: "com.android.bluetooth.flags"
+  name: "map_mime_multipart"
+  state: ENABLED
+  permission: READ_WRITE
+}