Tab5 audio, I2C improvements, UiDensity moved to lvgl-module and cleanup (#506)

- UiDensity moved to lvgl-module
- Deleted tt_hal and tt_hal_gpio (breaks apps, but will fix those right after merging)
- Added I2C 8 bit register operations
- Added device.properties to simulator
- Improved Tab5 hardware init, implement audio
- Add README.md to kernel

Devices/simulator/device.properties

@@ -0,0 +1,13 @@
+[general]
+vendor=Simulator
+name=Tab5Simulator
+
+[apps]
+launcherAppId=Launcher
+
+[hardware]
+target=POSIX
+
+[lvgl]
+colorDepth=16
+fontSize=14