manager: install: add choose partition support

manager: fix KsuCli cmd

userspace: reuse choose_boot_device

- manager: simplify find boot image

Co-authored-by: weishu <twsxtd@gmail.com>
Co-authored-by: YuKongA <70465933+YuKongA@users.noreply.github.com>
Co-authored-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>

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

@@ -108,8 +108,9 @@
     <string name="direct_install">直接安装（推荐）</string>
     <string name="select_file">选择一个需要修补的镜像</string>
     <string name="install_inactive_slot">安装到未使用的槽位（OTA 后）</string>
-    <string name="install_inactive_slot_warning">将在重启后强制切换到另一个槽位！\n注意只能在 OTA 更新完成后的重启之前使用。\n确认？</string>
+    <string name="install_inactive_slot_warning">将在重启后强制切换到另一个槽位！注意只能在 OTA 更新完成后的重启之前使用。</string>
     <string name="install_next">下一步</string>
+    <string name="install_select_partition">选择分区</string>
     <string name="install_upload_lkm_file">使用本地 LKM 文件</string>
     <string name="install_only_support_ko_file">仅支持选择 .ko 文件</string>
     <string name="select_file_tip">建议选择 %1$s 分区镜像</string>

manager/app/src/main/res/values/strings.xml

@@ -112,6 +112,7 @@
     <string name="install_inactive_slot">Install to inactive slot (After OTA)</string>
     <string name="install_inactive_slot_warning">Your device will be **FORCED** to boot to the current inactive slot after a reboot!\nOnly use this option after OTA is done.\nContinue?</string>
     <string name="install_next">Next</string>
+    <string name="install_select_partition">Select partition</string>
     <string name="install_upload_lkm_file">Use local LKM file</string>
     <string name="install_only_support_ko_file">Only .ko files are supported</string>
     <string name="select_file_tip">%1$s partition image is recommended</string>