Advance RELEASE_SOONG_ONLY_PANTHER to true in trunk_staging

This commit was automatically created by a workflow in Gantry:
https://releasetracker.partner.android.com/changes/7p29mg6000001?stage_id=0tn5mg6000001

Flag: RELEASE_SOONG_ONLY_PANTHER
Ignore-AOSP-First: Flag change added internally for future AOSP release
Workflow-User: spandandas@google.com
Change-Id: I1bfdd8c2dd7cc6bc1eadc26bf2478560b064a276
1 file changed