fix [支持可选地始终显示设置的默认标题栏文字选项]

selector/src/main/java/com/luck/picture/lib/style/TitleBarStyle.java

@@ -20,6 +20,11 @@ public class TitleBarStyle {
      */
     private int previewTitleLeftBackResource;
 
+    /**
+     * 标题栏是否始终显示默认文案
+     */
+    private boolean titleDefaultTextAlways;
+
     /**
      * 标题栏默认文案
      */
@@ -143,6 +148,14 @@ public void setPreviewTitleLeftBackResource(int previewTitleLeftBackResource) {
         this.previewTitleLeftBackResource = previewTitleLeftBackResource;
     }
 
+    public boolean isTitleDefaultTextAlways() {
+        return titleDefaultTextAlways;
+    }
+
+    public void setTitleDefaultTextAlways(boolean titleDefaultTextAlways) {
+        this.titleDefaultTextAlways = titleDefaultTextAlways;
+    }
+
     public String getTitleDefaultText() {
         return titleDefaultText;
     }

selector/src/main/java/com/luck/picture/lib/widget/TitleBar.java

@@ -119,6 +119,10 @@ public View getTitleBarLine() {
      * @param title
      */
     public void setTitle(String title) {
+        if (config.selectorStyle.getTitleBarStyle().isTitleDefaultTextAlways()){
+            return;
+        }
+
         tvTitle.setText(title);
     }