Add a sysprop to specify game default frame rate

Introduce a new sysprop
`ro.surface_flinger.game_default_frame_rate_override`
to set the default frame rate for games.

Bug: 286084594
Change-Id: Ifdbf5bc9621976a0583df49eb9531de1c423385b
Test: N/A
diff --git a/private/property_contexts b/private/property_contexts
index 9d1439d..48f5c5f 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -1345,6 +1345,7 @@
 ro.surface_flinger.ignore_hdr_camera_layers               u:object_r:surfaceflinger_prop:s0 exact bool
 ro.surface_flinger.clear_slots_with_set_layer_buffer      u:object_r:surfaceflinger_prop:s0 exact bool
 ro.surface_flinger.prime_shader_cache.ultrahdr            u:object_r:surfaceflinger_prop:s0 exact bool
+ro.surface_flinger.game_default_frame_rate_override       u:object_r:surfaceflinger_prop:s0 exact int
 
 ro.sf.disable_triple_buffer u:object_r:surfaceflinger_prop:s0 exact bool
 ro.sf.lcd_density           u:object_r:surfaceflinger_prop:s0 exact int