Add some code to set the Mi Band latency

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/miband/MiBandSupport.java

@@ -496,6 +496,44 @@ public class MiBandSupport extends AbstractBTLEDeviceSupport {
         }
     }
 
+    private byte[] getHighLatency() {
+        int minConnectionInterval = 460;
+        int maxConnectionInterval = 500;
+        int latency = 0;
+        int timeout = 500;
+        int advertisementInterval = 0;
+
+        return getLatency(minConnectionInterval, maxConnectionInterval, latency, timeout, advertisementInterval);
+    }
+
+    private byte[] getLatency(int minConnectionInterval, int maxConnectionInterval, int latency, int timeout, int advertisementInterval) {
+        byte result[] = new byte[12];
+        result[0] = (byte)(minConnectionInterval & 0xff);
+        result[1] = (byte)(0xff & minConnectionInterval >> 8);
+        result[2] = (byte)(maxConnectionInterval & 0xff);
+        result[3] = (byte) (0xff & maxConnectionInterval >> 8);
+        result[4] = (byte)(latency & 0xff);
+        result[5] = (byte)(0xff & latency >> 8);
+        result[6] = (byte)(timeout & 0xff);
+        result[7] = (byte) (0xff & timeout >> 8);
+        result[8] = 0;
+        result[9] = 0;
+        result[10] = (byte)(advertisementInterval & 0xff);
+        result[11] = (byte)(0xff & advertisementInterval >> 8);
+
+        return result;
+    }
+
+    private byte[] getLowLatency() {
+        int minConnectionInterval = 39;
+        int maxConnectionInterval = 49;
+        int latency = 0;
+        int timeout = 500;
+        int advertisementInterval = 0;
+
+        return getLatency(minConnectionInterval, maxConnectionInterval, latency, timeout, advertisementInterval);
+    }
+
     @Override
     public void onInstallApp(Uri uri) {
         // not supported