fix toot sending twice when using a hardware keyboard (#1758)

app/src/main/java/com/keylesspalace/tusky/components/compose/ComposeActivity.kt

@@ -1126,6 +1126,7 @@ class ComposeActivity : BaseActivity(),
 
     override fun onKeyDown(keyCode: Int, event: KeyEvent): Boolean {
         Log.d(TAG, event.toString())
+        if(event.action == KeyEvent.ACTION_DOWN) {
             if (event.isCtrlPressed) {
                 if (keyCode == KeyEvent.KEYCODE_ENTER) {
                     // send toot by pressing CTRL + ENTER
@@ -1138,7 +1139,7 @@ class ComposeActivity : BaseActivity(),
                 onBackPressed()
                 return true
             }
-
+        }
         return super.onKeyDown(keyCode, event)
     }