samples: bluetooth: Disable auto phy updates in ras_reflector

Let the peer (initiating) device be the one who does the phy updates, if
any.

The background for this change is that the automatic phy updates of the
ras_reflector was causing some interop issues with some android devices.

Signed-off-by: Erik Sandgren <erik.sandgren@nordicsemi.no>

Author: eriksandgren

samples/bluetooth/channel_sounding/ras_reflector/prj.conf

@@ -39,6 +39,9 @@ CONFIG_BT_CTLR_CHANNEL_SOUNDING_TEST=n
 # This allows CS and ACL to use different PHYs
 CONFIG_BT_TRANSMIT_POWER_CONTROL=y
 
+# Let the initiating device control the PHY updates
+CONFIG_BT_AUTO_PHY_UPDATE=n
+
 CONFIG_BT_CHANNEL_SOUNDING=y
 CONFIG_BT_RAS=y
 CONFIG_BT_RAS_RRSP=y