Fix testVerifyStatsExternalConsistent case

Root cause: For devices mount /data partition without quota option will
get this testcase failure, because
the getExternalSize logic will use Android/obb path
to calculate totalsize.
But the testcase will check the totalsize excluding obb.

Solution: For device mounted userdata without quota option
will remove obbSize from totalSize, to
Make android.appsecurity.cts.StorageHostTest
testcase PASS.

Test:  run cts-on-gsi -m CtsAppSecurityHostTestCases -t
android.appsecurity.cts.StorageHostTest

Bug: 145269983
Change-Id: I8df02d5427d7512046ca3793f03a133a4ad00cbd
1 file changed