Before we where keeping the same stream for different calls, and the fileDescriptor was different so we could end up writting to an invalid file descriptor. Test: Run adb backup and restore of wallpaper package that was failing. Test: cts-tradefed run commandAndExit cts -m CtsBackupHostTestCases BUG: 117139223 Change-Id: I0d696a0e114f35427514730b0067b169f1bed08a