Readdir should extract file name from DATA column

Previously, we used MediaColumns#DISPLAY_NAME to extract file names in
the given directory. MediaColumn#DISPLAY_NAME for pending and trashed
files doesn't match the file name in the lower file system. Changed
readdir to extract file name from FileColumns#DATA which contains the
actual path of the file.

Test: atest FuseDaemonHostTest#testListPendingAndTrashed
Test: atest FuseDaemonHostTest
Bug: 148585977
Change-Id: I25885e181d8fe7928eeac9cb9b33c8120842648a
1 file changed