Deactivate some unsupported things for Mi2

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/AbstractDeviceCoordinator.java

@@ -23,6 +23,7 @@ public abstract class AbstractDeviceCoordinator implements DeviceCoordinator {
         return new GBDevice(candidate.getDevice().getAddress(), candidate.getName(), getDeviceType());
     }
 
+    @Override
     public boolean allowFetchActivityData(GBDevice device) {
         return device.isInitialized() && !device.isBusy() && supportsActivityDataFetching();
     }

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/miband/MiBand2Coordinator.java

@@ -8,6 +8,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import nodomain.freeyourgadget.gadgetbridge.devices.InstallHandler;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
 
@@ -35,6 +36,21 @@ public class MiBand2Coordinator extends MiBandCoordinator {
 
     }
 
+    @Override
+    public boolean supportsHeartRateMeasurement(GBDevice device) {
+        return false; // not yet
+    }
+
+    @Override
+    public boolean supportsAlarmConfiguration() {
+        return false; // not yet
+    }
+
+    @Override
+    public boolean supportsActivityDataFetching() {
+        return false; // not yet
+    }
+
     @Override
     public InstallHandler findInstallHandler(Uri uri, Context context) {
         return null; // not supported at the moment