Changed|Fixed: Always request MANAGE_EXTERNAL_STORAGE if on Android >= 11 when running termux-setup-storage`

Requesting `MANAGE_EXTERNAL_STORAGE` should additionally grant access to unreliable/removable volumes like USB OTG devices under the `/mnt/media_rw/XXXX-XXXX` paths on `Android >= 12`, so request that if possible. Check https://github.com/termux/termux-app/issues/71#issuecomment-1869222653 for more info.

Fixes issue on Android `14`, where using `targetSdkVersion=28`, that requests the legacy `WRITE_EXTERNAL_STORAGE` will actually request the `photos, music, video, and other files` permissions (`READ_MEDIA_AUDIO`/`READ_MEDIA_IMAGES`/`READ_MEDIA_VIDEO`) and apparently access to full external storage `/sdcard` is not available for some users, maybe because `READ_EXTERNAL_STORAGE` and `WRITE_EXTERNAL_STORAGE` permissions are not granted for those device automatically in addition to `READ_MEDIA_*` permission. The issue is not reproducible on Android `13-15` avd. To solve this, we request the singular `MANAGE_EXTERNAL_STORAGE` permission instead so that full access is always available.

Related: https://github.com/termux/termux-app/issues/3647#issuecomment-2137266012

See also:
- https://developer.android.com/training/data-storage/shared/media#access-other-apps-files
- https://developer.android.com/reference/android/Manifest.permission#READ_MEDIA_IMAGES

app/src/main/java/com/termux/app/TermuxActivity.java

@@ -785,7 +785,7 @@ public final class TermuxActivity extends AppCompatActivity implements ServiceCo
 
                 // If permission is granted, then also setup storage symlinks.
                 if(PermissionUtils.checkAndRequestLegacyOrManageExternalStoragePermission(
-                    TermuxActivity.this, requestCode, !isPermissionCallback)) {
+                    TermuxActivity.this, requestCode, true, !isPermissionCallback)) {
                     if (isPermissionCallback)
                         Logger.logInfoAndShowToast(TermuxActivity.this, LOG_TAG,
                             getString(com.termux.shared.R.string.msg_storage_permission_granted_on_request));