Target Android 11

[zhanghai]

• Use MANAGE_EXTERNAL_STORAGE

  Due to COVID-19 related considerations, apps that target Android 11 (API level 30) and request All files access cannot be uploaded to Google Play until early 2021. This includes new apps as well as updates to existing apps. This temporary uploading restriction only affects apps that both target Android 11 (API level 30) and request the All files access permission.

  For now, if you think All files access is needed for your app, it is recommended that you don’t update your target SDK level to Android 11 (API level 30) at this time. If you target Android 10, consider using the requestLegacyExternalStorage flag.

  https://support.google.com/googleplay/android-developer/answer/9956427

  So I'm punting this to mid 2021.

  See also R.attr.requestRawExternalStorageAccess.

• Bypass hidden API restriction with meta-reflection no longer working.

  • ChickenHook/RestrictionBypass: Blog post
  • tiann/FreeReflection: Doesn't work on MIUI Android 11, as in tiann/FreeReflection#33.

• DocumentsProvider Android/data access will stop working on Android 12 when targeting 31, not sure about 30 yet.

• Mount namespace when running as root.