raphael: reduce WiFi Scans (Increase interval to 5 minutes)

By default, WiFi scans every 15 seconds. Change this to every 5 minutes to save battery.
We dont change WiFi locations that often to need a check every 15 seconds.

Taken from here: https://www.rankred.com/android-build-prop-tweaks/

system.prop

@@ -57,6 +57,10 @@ persist.vendor.sensors.enable.mag_filter=true
 # Vendor
 ro.vendor.qti.va_aosp.support=1
 
+# WiFi Scan Interval (default = 15s)
+PRODUCT_PROPERTY_OVERRIDES += \
+    wifi.supplicant_scan_interval=600
+
 # ZRAM writeback
 ro.zram.mark_idle_delay_mins=60
 ro.zram.first_wb_delay_mins=1440