manager: Clean code & bump AGP version

manager/app/src/main/res/values-zh-rCN/strings.xml

@@ -242,8 +242,6 @@
     <string name="image_editor_hint">使用双指缩放图片，单指拖动调整位置</string>
     <string name="reprovision">重置</string>
     <!-- Kernel Flash Progress Related -->
-    <string name="horizon_flash_title">刷写 Kernel</string>
-    <string name="horizon_logs_label">日志:</string>
     <string name="horizon_flash_complete">刷写完成</string>
     <!-- Flash Status Related -->
     <string name="horizon_preparing">准备中…</string>