Make persist.sys.sf.native_mode an integer

This allows for more native modes.

Bug: 73824924
Test: adb shell setprop persist.sys.sf.native_mode 2
Change-Id: Iffdeadc8dc260de4b0c7f2b46aab08d64d25e3b1

public/property_contexts

@@ -70,7 +70,7 @@ persist.dbg.wfc_avail_ovr u:object_r:exported3_default_prop:s0 exact int
 persist.radio.multisim.config u:object_r:exported3_radio_prop:s0 exact string
 persist.sys.dalvik.vm.lib.2 u:object_r:exported2_system_prop:s0 exact string
 persist.sys.sf.color_saturation u:object_r:exported2_system_prop:s0 exact string
-persist.sys.sf.native_mode u:object_r:exported2_system_prop:s0 exact bool
+persist.sys.sf.native_mode u:object_r:exported2_system_prop:s0 exact int
 persist.vendor.bluetooth.a2dp_offload.enable u:object_r:bluetooth_a2dp_offload_prop:s0 exact bool
 pm.dexopt.ab-ota u:object_r:exported_pm_prop:s0 exact string
 pm.dexopt.bg-dexopt u:object_r:exported_pm_prop:s0 exact string