adds alert dialog to Skydio and Parrot buttons

app/src/main/java/fieldscience/cs/earlham/edu/fieldday/ParrotFlightActivity.java

 package fieldscience.cs.earlham.edu.fieldday;
 
 import android.app.Activity;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.os.Bundle;
 
-public class ParrotFlightActivity extends Activity {
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.app.AppCompatActivity;
+
+public class ParrotFlightActivity extends AppCompatActivity {
+    private Context context;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        //setContentView(R.layout.activity_uav);
+        context = this;
+
+        AlertDialog.Builder alert = new AlertDialog.Builder(ParrotFlightActivity.this)
+                .setTitle("UAV Support Coming Soon")
+                .setMessage("We are developing support for UAV flights in Field Day now. Check back soon!")
+                .setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int id) {
+                    }
+                });
+        AlertDialog dialog = alert.create();
+        dialog.show();
+    }
 }

app/src/main/java/fieldscience/cs/earlham/edu/fieldday/SkydioFlightActivity.java

 package fieldscience.cs.earlham.edu.fieldday;
 
 import android.app.Activity;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.os.Bundle;
 
-public class SkydioFlightActivity extends Activity {
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.app.AppCompatActivity;
+
+public class SkydioFlightActivity extends AppCompatActivity {
+    private Context context;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        //setContentView(R.layout.activity_uav);
+        context = this;
+
+        AlertDialog.Builder alert = new AlertDialog.Builder(SkydioFlightActivity.this)
+                .setTitle("UAV Support Coming Soon")
+                .setMessage("We are developing support for UAV flights in Field Day now. Check back soon!")
+                .setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int id) {
+                    }
+                });
+        AlertDialog dialog = alert.create();
+        dialog.show();
+    }
 }