testAllCharacterDevicesAreSecure: move to host side

Move testAllCharacterDevicesAreSecure() to a host side test.
Currently, this CTS test is unable to enumerate devices on /dev
becuase SE Linux policy is blocking it. Rather then open this
access to untrusted_app domain, move the test host side where
shell domain shall be granted access.

bug: 28306036
Change-Id: Ie75366f0efe88a0d265d62b6cdc8014827e2e069
2 files changed