Remove extra quotes around adb.shell args.

aosp/748370 changes behavior of adb.shell cmd, which breaks some the
test cases. Remove extra quotes to fix.

Fixes: 118499847
Test: vts-tradefed run commandAndExit vts --skip-all-system-status-check
--primary-abi-only --skip-preconditions --skip-device-info --module
VtsKernelProcFileApi
Change-Id: I3c7da3ea3305986c5ca221f6419d700289240ad5
1 file changed