The internal emmc (mmcblk2) should not need to be managed by vold.
This entry confuses StorageManagerService as observeable in logcat:

   W StorageManagerService: Reporting public:179,6 unmounted due to system locked
   W StorageManagerService: Reporting public:179,7 unmounted due to system locked
   W StorageManagerService: Reporting public:179,8 unmounted due to system locked
   W StorageManagerService: Reporting public:179,9 unmounted due to system locked
   W StorageManagerService: Reporting emulated;0 unmounted due to system locked
   W StorageManagerService: Reporting public:179,10 unmounted due to system locked
   W StorageManagerService: Reporting public:179,1 unmounted due to system locked
   W StorageManagerService: Reporting public:179,2 unmounted due to system locked
   W StorageManagerService: Reporting public:179,3 unmounted due to system locked

Change the wildcard to mmcblk[0-1] instead.

Note: this also removes the "Issue with SD card" popups from the UI.

Test: m TARGET_USE_TABLET_LAUNCHER=true TARGET_VIM3=true TARGET_KERNEL_USE=5.4
      # boot to UI; no UI dropdown for internal sdcard reformatting
      # usb stick is mounted and useable from UI
      # external sdcard is mountable and useable from UI

Change-Id: Ie1dba1928b0d64732e041957f6e92cbee3866277
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>