sdm: color-manager: Detect first frame of UI to apply color-mode.

Default color-mode is applied on the first frame of UI screen.
sdm.boot_anim_layer_count property is used to configure the
number of layers in boot animation process. Any commit with
more layers than sdm.boot_anim_layer_count is treated as first frame
of UI and default color-mode is applied at this point.

CRs-Fixed: 939410
Change-Id: Ib5c568819cd045f0de4ee7dcb4accfae9c27f5b2

sdm/libs/utils/debug.cpp

@@ -59,6 +59,13 @@ int Debug::GetIdleTimeoutMs() {
   return value;
 }
 
+int Debug::GetBootAnimLayerCount() {
+  int value = 0;
+  debug_.debug_handler_->GetProperty("sdm.boot_anim_layer_count", &value);
+
+  return value;
+}
+
 bool Debug::IsRotatorDownScaleDisabled() {
   int value = 0;
   debug_.debug_handler_->GetProperty("sdm.debug.rotator_downscale", &value);