tuna: Recovery updates

Add BOARD_HAS_NO_SELECT_BUTTON for recovery go-back button

Change-Id: Ib7215feadc09e05cf5743affc20f04bd275411b9
samsung/tuna: Add recovery_keys.c to fix skipping highlight in recovery.

Change-Id: Ie5a1286cd6fbbded86064e8589b8e38f5d4f3448
Switch board defines to the new ones expected by recovery.

Change-Id: Ic33d70d43bb13c39a248a3114969a66dc285c22d
selinux: Don't reset inherited system-wide configs