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

Author: stagadish

services/surfaceflinger/common/FlagManager.cpp

@@ -119,6 +119,7 @@ void FlagManager::dump(std::string& result) const {
     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_LEGACY_SERVER_FLAG(use_skia_tracing, PROPERTY_SKIA_ATRACE_ENABLED,
 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")

services/surfaceflinger/common/include/common/FlagManager.h

@@ -58,6 +58,7 @@ class FlagManager {
     bool connected_display() const;
     bool frame_rate_category_mrr() const;
     bool enable_small_area_detection() const;
+    bool stable_edid_ids() const;
     bool misc1() const;
     bool vrr_config() const;
     bool hotplug2() const;

services/surfaceflinger/surfaceflinger_flags_new.aconfig

@@ -206,6 +206,14 @@ flag {
   }
  } # skip_invisible_windows_in_input
 
+flag {
+  name: "stable_edid_ids"
+  namespace: "core_graphics"
+  description: "Guard use of the new stable EDID-based display IDs system."
+  bug: "352320847"
+  is_fixed_read_only: true
+} # stable_edid_ids
+
 flag {
   name: "true_hdr_screenshots"
   namespace: "core_graphics"