Add support VSYNC for Xiaomi MI 2

Signed-off-by: sndnvaps <sndnvaps@gmail.com>
Fix display on old devices

Signed-off-by: sndnvaps <sndnvaps@gmail.com>
Add TDB tools
Add Mi 2 support
 But not full support TrueDualBoot in recovery mode
 only support it on command line of recovery mode
 i.e, Adb shell.

Signed-off-by: sndnvaps <sndnvaps@gmail.com>