Update SDLTouch to handle NSNull occurence

[kshala-ford]

Bug Report

Previously before implementing SDL-0219 the class SDLTouch included a check for touch timestamp array if it contains NSNull. Now the dictionary store returns nil instead of the raw value. There are no real repro steps to reproduce 100%. We did see this issue occurring on older devices after upgrading to the new library version. We also experience that it's easier to reproduce on Ford TDKs.

The issue should be fixed by changing touch to read if the dict store returns nil. Additionally for the time of testing the app the nav app developers would need to disable assertions in the log config.

Reproduction Steps

1. Use a navigation projection app with sdl_ios 6.5.0
2. Power up the Ford TDK
3. Connect the iPhone over USB
4. Start the navigation app
5. Try to tap or pan the map of the nav app

Expected Behavior

• The touch input should be received by the touch manager
• The app should react on the touch gestures

Observed Behavior

• Any touch action isn't applied to the app (e.g. maps are not moving)
  Logs are showing

fault RPC com.sdl.log 14:01:56.324393+0100 NavApp Retrieving array from store error: Requested NSNumber but returned NSNull
default 14:01:56.324475+0100 NavApp *** Assertion failure in -[SDLLogManager logAssertWithTimestamp:file:functionName:line:queue:formatMessage:], /Users/kshala/Documents/Sourcetree/github.com/sdl_ios/SmartDeviceLink/SDLLogManager.m:144
error Proxy com.sdl.log 14:01:56.324599+0100 NavApp Proxy: Failed to handle protocol message SDL ASSERTION: Retrieving array from store error: Requested NSNumber but returned NSNull. To disable these assertions, alter your SDLLogConfiguration and set disableAssertions to YES

OS & Version Information

• iOS Version: Tested on 13.3 but the issue should be iOS independent
• SDL iOS Version: 6.5.0
• Testing Against: Test navigation app / Ford SYNC3 v3.0, v3.3 and v3.4