[FEATURE] CUSTOMROM SODP AOSP 11 Add ext4 VOLD support for sdcards

[MartinX3]

ext4 is only supported for the internal storage.
SODP uses mainly AOSP and AOSP doesn't support ext4 by default.
So teach VOLD in SODP AOSP the usage of ext4 in sdcards via a commit.

PR's for A10 Custom ROMs
http://gerrit.aospextended.com/c/AospExtended/platform_system_vold/+/412/2
https://review.lineageos.org/c/LineageOS/android_system_vold/+/258169