Flag: Add a trunk-stable flag to guard EDID-based Display IDs

Add a trunk-stable flag to guard the use of EDID-based display IDs.

See: go/edid-display-ids-al13

Flag: com.android.graphics.surfaceflinger.flags.stable_edid_ids
Bug: 352320847
Test: None.
Change-Id: Ifc59d031faeb19aedf5eccc68a1c9a5d0f538122
diff --git a/services/surfaceflinger/common/FlagManager.cpp b/services/surfaceflinger/common/FlagManager.cpp
index 169fef9..a99b57b 100644
--- a/services/surfaceflinger/common/FlagManager.cpp
+++ b/services/surfaceflinger/common/FlagManager.cpp
@@ -119,6 +119,7 @@
     DUMP_READ_ONLY_FLAG(adpf_fmq_sf);
     DUMP_READ_ONLY_FLAG(connected_display);
     DUMP_READ_ONLY_FLAG(enable_small_area_detection);
+    DUMP_READ_ONLY_FLAG(stable_edid_ids);
     DUMP_READ_ONLY_FLAG(frame_rate_category_mrr);
     DUMP_READ_ONLY_FLAG(misc1);
     DUMP_READ_ONLY_FLAG(vrr_config);
@@ -228,6 +229,7 @@
 FLAG_MANAGER_READ_ONLY_FLAG(adpf_fmq_sf, "")
 FLAG_MANAGER_READ_ONLY_FLAG(connected_display, "")
 FLAG_MANAGER_READ_ONLY_FLAG(enable_small_area_detection, "")
+FLAG_MANAGER_READ_ONLY_FLAG(stable_edid_ids, "debug.sf.stable_edid_ids")
 FLAG_MANAGER_READ_ONLY_FLAG(frame_rate_category_mrr, "debug.sf.frame_rate_category_mrr")
 FLAG_MANAGER_READ_ONLY_FLAG(misc1, "")
 FLAG_MANAGER_READ_ONLY_FLAG(vrr_config, "debug.sf.enable_vrr_config")