Generate app properties file and include in package.

This INI file will later be used to read any properties
defined inside tiapp.xml.

[TIMOB-10499]
Support reading tiapp properties.

[TIMOB-10499]
Fix app property INI file generation and crash.

We saw a crash occuring caused by how we generate the "compile time"
properties INI file. The values are just "strings" and not valid JSON.
So we can skip the JSON parsing since it isn't needed and won't work.

[TIMOB-10499]
Merge branch 'TIMOB-10499'