settings command list by user

bug: 119872843
Test: $ adb -e shell settings list
Bad arguments
$ adb -e shell settings list secure
$ adb -e shell settings list gl
Invalid namespace 'gl'
$ adb -e shell settings list global
...
$ adb -e shell settings list --user 10 global
...
$ adb -e shell settings list --user 0 global
...
$ adb -e shell settings put --user 10 secure zzz.test true
$ adb -e shell settings get --user 10 secure zzz.test
true
$ adb -e shell settings get --user 0 secure zzz.test
null
$ adb -e shell settings list --user 0 secure
... zzz.test not present ...
$ adb -e shell settings list --user 10 secure
...
zzz.test=true

Change-Id: I8ab3d20cbe9221a52f85151d97e0c6d92bf7bb43