SF,HDR: Add readonly flag for connected display HDR feature

Bug: 374182788
Bug: 374187407
Test: adb shell dumpsys SurfaceFlinger | grep connected_display_hdr
Flag: com.android.graphics.surfaceflinger.flags.connected_display_hdr
Change-Id: I29ba7ecb289f55e6d2be2b74f82bf012d3530ec5
Signed-off-by: Sasha McIntosh <sashamcintosh@google.com>
diff --git a/services/surfaceflinger/common/FlagManager.cpp b/services/surfaceflinger/common/FlagManager.cpp
index 658bca6..992c6b0 100644
--- a/services/surfaceflinger/common/FlagManager.cpp
+++ b/services/surfaceflinger/common/FlagManager.cpp
@@ -157,6 +157,7 @@
     DUMP_READ_ONLY_FLAG(trace_frame_rate_override);
     DUMP_READ_ONLY_FLAG(true_hdr_screenshots);
     DUMP_READ_ONLY_FLAG(display_config_error_hal);
+    DUMP_READ_ONLY_FLAG(connected_display_hdr);
 
 #undef DUMP_READ_ONLY_FLAG
 #undef DUMP_SERVER_FLAG
@@ -262,6 +263,7 @@
 FLAG_MANAGER_READ_ONLY_FLAG(single_hop_screenshot, "");
 FLAG_MANAGER_READ_ONLY_FLAG(true_hdr_screenshots, "debug.sf.true_hdr_screenshots");
 FLAG_MANAGER_READ_ONLY_FLAG(display_config_error_hal, "");
+FLAG_MANAGER_READ_ONLY_FLAG(connected_display_hdr, "");
 
 /// Trunk stable server flags ///
 FLAG_MANAGER_SERVER_FLAG(refresh_rate_overlay_on_external_display, "")