MT2 Improvements

[1Revenger1]

This PR brings improvements to the MT2 in both USB and BT mode.

• (#b15c782) Tip Switch is set based off of state bits sent out by the MT2, which distinguishes between contacts and near field fingers.
  • Reduces errors from hovering fingers, such as directly after scrolling or three finger gestures
• (#ec3adee) Timestamp is replaced with the timestamp given in the reports as well.
• (#7e3d1d2) Check report IDs on incoming reports and retrieve next input report when an unknown report is received. The MT2 over BT will send input reports with battery percentage or other information. Receiving these reports without queuing to receive another input report can brick the touchpad until the driver is reset.

These changes should also be somewhat portable to other touchpad variants. The state bits are sent out by every trackpad variant, including those that do not report pressure (such as my MacbookPro9,2). I do not have windows on my MBP9,2, so have no way to test a driver variant with these state bits.

I separated out the changes into different commits, so feel free to cherry pick whichever ones you want.

[youdonghai]

Hi 1Revenger1, could you create a release package from your PR for everyone to use?

[1Revenger1]

Unfortunately not. I do not have the resources necessary to sign a release.

[vitoplantamura]

hey, thanks for this PR.

Your work inspired me to create a "more complete" version of the imbushuo driver, with a Control Panel, haptic feedback control and more options to increase pointer precision:

https://github.com/vitoplantamura/MagicTrackpad2ForWindows

Thanks, Vito