[fenix] For https://github.com/mozilla-mobile/fenix/issues/1211 - Hide keyboard on fling suggestions list

app/src/main/java/org/mozilla/fenix/search/awesomebar/AwesomeBarUIView.kt

@@ -9,6 +9,7 @@ import android.view.LayoutInflater
 import android.view.ViewGroup
 import androidx.core.content.ContextCompat
 import androidx.core.graphics.drawable.toBitmap
+import androidx.recyclerview.widget.RecyclerView
 import io.reactivex.Observable
 import io.reactivex.Observer
 import io.reactivex.functions.Consumer
@@ -21,6 +22,7 @@ import mozilla.components.feature.awesomebar.provider.SearchSuggestionProvider
 import mozilla.components.feature.awesomebar.provider.SessionSuggestionProvider
 import mozilla.components.feature.search.SearchUseCases
 import mozilla.components.feature.session.SessionUseCases
+import mozilla.components.support.ktx.android.view.hideKeyboard
 import org.mozilla.fenix.R
 import org.mozilla.fenix.ThemeManager
 import org.mozilla.fenix.ext.components
@@ -151,6 +153,15 @@ class AwesomeBarUIView(
                 )
 
             shortcutEngineManager.shortcutsEnginePickerProvider = shortcutsEnginePickerProvider
+
+            val listener = object : RecyclerView.OnFlingListener() {
+                override fun onFling(velocityX: Int, velocityY: Int): Boolean {
+                    view.hideKeyboard()
+                    return false
+                }
+            }
+
+            view.onFlingListener = listener
         }
     }