SourcePreferencesController: Also call onBindEditText listener set by extension (#6310)

(cherry picked from commit e51a6d332e)

app/src/main/java/androidx/preference/EditTextPreferenceExtensions.kt

@@ -0,0 +1,8 @@
+package androidx.preference
+
+/**
+ * Returns package-private [EditTextPreference.getOnBindEditTextListener]
+ */
+fun EditTextPreference.getOnBindEditTextListener(): EditTextPreference.OnBindEditTextListener? {
+    return onBindEditTextListener
+}