Small fixes to task proto serialization

[sufyanAbbasi]

Fixes #1911
Fixes #1922
Fixes #1921

Ensures that tasks are properly serialized to proto and are updated on task creation step.

• Calls updateJob() on addOrUpdateTask() routine to ensure that we serialize the task proto at the right time.
• Added a task list parameter override to account for the job's tasks list to be readonly
• Supports arrays when serializing task list into proto
• Don't serialize task protos in survey > job > tasks, since we are parsing them from /jobs instead.
• Fixed issue with swapped LOI_METADATA and LOI_DATA fields.
• Fixed issue with minAccuracyMeters set to null instead of a default value --> gets optimized out.
• Tested on local web server