sanders: Set sys.usb.ffs.aio_compat

The kernel does not support aio with ffs.
Set the property so adb/mtp know to use the compatible
functions, and the same while in recovery.

Bug: 37916658
Test: Use adb / use adb in recovery
Change-Id: Id35a05fcb9952dcf7239bd15a61cc620537419bc

rootdir/etc/init.mmi.usb.rc

@@ -58,6 +58,7 @@ on fs
     mkdir /dev/usb-ffs/adb 0770 shell shell
     mount functionfs adb /dev/usb-ffs/adb uid=2000,gid=2000
     write /sys/class/android_usb/android0/f_ffs/aliases adb
+    setprop sys.usb.ffs.aio_compat 1
 
 #  Disable USB-SS in bp-tools
 on property:ro.bootmode=bp-tools