Collapse header if the device has no touchscreen

The header can't be collpased without a touchscreen, so collapse
it if we detect that the current device has no touchscreen.

src/org/lineageos/updater/UpdatesActivity.java

@@ -138,6 +138,11 @@ public class UpdatesActivity extends AppCompatActivity {
                 }
             }
         });
+
+        if (!Utils.hasTouchscreen(this)) {
+            // This can't be collapsed without a touchscreen
+            appBar.setExpanded(false);
+        }
     }
 
     @Override

src/org/lineageos/updater/misc/Utils.java

@@ -17,6 +17,7 @@ package org.lineageos.updater.misc;
 
 import android.content.Context;
 import android.content.Intent;
+import android.content.pm.PackageManager;
 import android.content.SharedPreferences;
 import android.net.ConnectivityManager;
 import android.net.NetworkInfo;
@@ -280,4 +281,8 @@ public class Utils {
         zipFile.close();
         return isAB;
     }
+
+    public static boolean hasTouchscreen(Context context) {
+        return context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_TOUCHSCREEN);
+    }
 }