[EasyUnlock] Update ProximityMonitor to only check for RSSI proximity.

components/proximity_auth/remote_device_life_cycle.h

Index: components/proximity_auth/remote_device_life_cycle.h
diff --git a/components/proximity_auth/remote_device_life_cycle.h b/components/proximity_auth/remote_device_life_cycle.h
index ed7f4c6d6b94c585bd69223c12ded4708b931165..2990e95b8f853ac99cfaed1d9d9555e522fd27f1 100644
--- a/components/proximity_auth/remote_device_life_cycle.h
+++ b/components/proximity_auth/remote_device_life_cycle.h
@@ -6,6 +6,7 @@
 #define COMPONENTS_PROXIMITY_AUTH_REMOTE_DEVICE_LIFE_CYCLE_H
 
 #include "base/macros.h"
+#include "components/cryptauth/connection.h"
 #include "components/cryptauth/remote_device.h"
 
 namespace proximity_auth {
@@ -57,6 +58,9 @@ class RemoteDeviceLifeCycle {
   // Returns the RemoteDevice instance that this life cycle manages.
   virtual cryptauth::RemoteDevice GetRemoteDevice() const = 0;
 
+  // Returns the current Connection, or null if the device is not yet connected.
+  virtual cryptauth::Connection* GetConnection() const = 0;
+
   // Returns the current state of in the life cycle.
   virtual State GetState() const = 0;