SF: Add a RO flag for a new hal api for reporting hdcp level

Bug:285359126
Test: adb shell dumpsys SurfaceFlinger | grep hdcp -- verify flag shows
up default false.

Change-Id: Ibb82906313bd2b851d1681556d945ace373278f3
diff --git a/services/surfaceflinger/FlagManager.cpp b/services/surfaceflinger/FlagManager.cpp
index 5bbdfe9..11a5e0d 100644
--- a/services/surfaceflinger/FlagManager.cpp
+++ b/services/surfaceflinger/FlagManager.cpp
@@ -103,6 +103,7 @@
     DUMP_FLAG(late_boot_misc2);
     DUMP_FLAG(vrr_config);
     DUMP_FLAG(hotplug2);
+    DUMP_FLAG(hdcp_level_hal);
 
 #undef DUMP_FLAG
 }
@@ -167,6 +168,7 @@
 FLAG_MANAGER_READ_ONLY_FLAG(misc1, "")
 FLAG_MANAGER_READ_ONLY_FLAG(vrr_config, "debug.sf.enable_vrr_config")
 FLAG_MANAGER_READ_ONLY_FLAG(hotplug2, "")
+FLAG_MANAGER_READ_ONLY_FLAG(hdcp_level_hal, "")
 
 /// Trunk stable server flags ///
 FLAG_MANAGER_SERVER_FLAG(late_boot_misc2, "")