test: Replace the C++ MOCK_METHOD<n> macros with the new MOCK_METHOD

Change-Id: I5099c727e9e918f19fa61acc91ef75250ebc6fa6
Signed-off-by: Willy Tu <wltu@google.com>

tools: split io interface out

Splits the io interface out into its own file to decouple the
internal/sys from it.

Signed-off-by: Patrick Venture <venture@google.com>
Change-

tools: split io interface out

Splits the io interface out into its own file to decouple the
internal/sys from it.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I65860e32152ef49cd987c11eb408516e13fadb29

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test: cleanup by moving tool tests into subfolder

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I15b3514d095d9fc770a1b0fe125eb48d96ada2c8