add GBDeviceProtocol again

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/protocol/GBDeviceProtocol.java

@@ -0,0 +1,73 @@
+package nodomain.freeyourgadget.gadgetbridge.protocol;
+
+import java.util.UUID;
+
+import nodomain.freeyourgadget.gadgetbridge.GBCommand;
+import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEvent;
+
+public abstract class GBDeviceProtocol {
+
+    public byte[] encodeSMS(String from, String body) {
+        return null;
+    }
+
+    public byte[] encodeEmail(String from, String subject, String body) {
+        return null;
+    }
+
+    public byte[] encodeGenericNotification(String title, String details) {
+        return null;
+    }
+
+    public byte[] encodeSetTime(long ts) {
+        return null;
+    }
+
+    public byte[] encodeSetCallState(String number, String name, GBCommand command) {
+        return null;
+    }
+
+    public byte[] encodeSetMusicInfo(String artist, String album, String track) {
+        return null;
+    }
+
+    public byte[] encodeFirmwareVersionReq() {
+        return null;
+    }
+
+    public byte[] encodeBatteryInfoReq() {
+        return null;
+    }
+
+    public byte[] encodeAppInfoReq() {
+        return null;
+    }
+
+    public byte[] encodeAppDelete(UUID uuid) {
+        return null;
+    }
+
+    public byte[] encodeAppStart(UUID uuid) {
+        return null;
+    }
+
+    public byte[] encodePhoneVersion(byte os) {
+        return null;
+    }
+
+    public byte[] encodeSynchronizeActivityData() {
+        return null;
+    }
+
+    public byte[] encodeReboot() {
+        return null;
+    }
+
+    public byte[] encodeFindDevice(boolean start) {
+        return null;
+    }
+
+    public GBDeviceEvent decodeResponse(byte[] responseData) {
+        return null;
+    }
+}