SF: add a new flag for omiting vsync on screen is OFF

Test: N/A
Bug: 331636736
Flag: com.android.graphics.surfaceflinger.flags.no_vsyncs_on_screen_off
Change-Id: I63916801f39bf45d8f058d36095452d39585c226

Author: adyabr

services/surfaceflinger/common/FlagManager.cpp

@@ -139,6 +139,7 @@ void FlagManager::dump(std::string& result) const {
     DUMP_READ_ONLY_FLAG(vrr_bugfix_dropped_frame);
     DUMP_READ_ONLY_FLAG(restore_blur_step);
     DUMP_READ_ONLY_FLAG(dont_skip_on_early_ro);
+    DUMP_READ_ONLY_FLAG(no_vsyncs_on_screen_off);
     DUMP_READ_ONLY_FLAG(protected_if_client);
     DUMP_READ_ONLY_FLAG(idle_screen_refresh_rate_timeout);
     DUMP_READ_ONLY_FLAG(graphite_renderengine);
@@ -244,6 +245,7 @@ FLAG_MANAGER_READ_ONLY_FLAG(vulkan_renderengine, "debug.renderengine.vulkan")
 FLAG_MANAGER_READ_ONLY_FLAG(renderable_buffer_usage, "")
 FLAG_MANAGER_READ_ONLY_FLAG(restore_blur_step, "debug.renderengine.restore_blur_step")
 FLAG_MANAGER_READ_ONLY_FLAG(dont_skip_on_early_ro, "")
+FLAG_MANAGER_READ_ONLY_FLAG(no_vsyncs_on_screen_off, "debug.sf.no_vsyncs_on_screen_off")
 FLAG_MANAGER_READ_ONLY_FLAG(protected_if_client, "")
 FLAG_MANAGER_READ_ONLY_FLAG(vrr_bugfix_24q4, "");
 FLAG_MANAGER_READ_ONLY_FLAG(vrr_bugfix_dropped_frame, "")

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

@@ -77,6 +77,7 @@ class FlagManager {
     bool renderable_buffer_usage() const;
     bool restore_blur_step() const;
     bool dont_skip_on_early_ro() const;
+    bool no_vsyncs_on_screen_off() const;
     bool protected_if_client() const;
     bool idle_screen_refresh_rate_timeout() const;
     bool graphite_renderengine() const;

services/surfaceflinger/surfaceflinger_flags_new.aconfig

@@ -149,6 +149,14 @@ flag {
   is_fixed_read_only: true
 } # local_tonemap_screenshots
 
+flag {
+  name: "no_vsyncs_on_screen_off"
+  namespace: "core_graphics"
+  description: "Stop vsync / Choreographer callbacks to apps when the screen is off"
+  bug: "331636736"
+  is_fixed_read_only: true
+} # no_vsyncs_on_screen_off
+
 flag {
   name: "single_hop_screenshot"
   namespace: "window_surfaces"