emulator: respawning when elevated

emulator: respawning when elevated

In order to prevent potential elevation of privilege attack, lower
privilege processes can't interfere with higher privilege on Windows.
Emulator is usually launched by emulator manager that has high integrity
level, then drag-and-drop from Explorer (mostly medium integrity level)
does not work.

So, when emulator process has elevated integrity level, we try to
respawn emulator with medium integrity level.

Change-Id: I17f29e411252758098304ba25b60219d07aa0d7c
Signed-off-by: Munkyu Im <munkyu.im@samsung.com>
Signed-off-by: SeokYeon Hwang <syeon.hwang@samsung.com>