Update sensors handling and move evaluateJavascript to message queue

[SecondThundeR]

• Allow sending null instead of empty object when sending event to client
• Add custom throttle when sending "changed" event for sensors to respect refresh rate parameter, because passing sampling period doesn't guarantee that it will send update for sensors at specified rate

  samplingPeriodUs - The rate sensor events are delivered at. This is only a hint to the system. Events may be received faster or slower than the specified rate. Usually events are received faster.

• Wrap all evaluateJavascript calls to webapp.post to make them asynchronous
• Refactor stopSensor function to accept 1 or many types as list and remove specific code for device orientation

[SecondThundeR]

• Match sensor delay calculation with Telegram for Android
• Match handling accelerometer values with Telegram for Android
• Match handling device orientation sensors and logic with Telegram for Android
• Add refresh rate value clamping between 20 and 1000 ms