Add cost controls to limit hosting costs

[gino-m]

Limits

Limit	Max	Web	Android	Cloud Functions
Max. survery / job / submission size	1 MiB*
Total no. surveys				✔️**
No. surveys / user		✔️		✔️**
No. emails / survey		✔️
Survey, job, task name length		✔️
Survey description length		✔️
No. jobs / survey		✔️
No. tasks / job		✔️
No. mult. choice options / task		✔️
Mult. choice option label length		✔️
Custom data consent terms length		✔️
No. sites / job			✔️	✔️**
No. vertices / primary (LOI) polygon			✔️	✔️
No. vertices / secondary polygon			✔️	✔️**
Photo size			✔️
Short text length	255 chars		✔️

source sheet

* enforced by Firebase
** create/edit operations will need to moved to Cloud Functions for this path to work

@jo-spek @kenstershiro Let's work through this at our next sync?

[gino-m]

After doing more research, enforcing these constraints on the backend would require a major refactor and the introduction of a Ground backend server to manage the quotas. The best we can do for now is to enforce these in the clients. This is probably a couple of weeks work to do. Will follow up with details on potential implementation here.

[kenstershiro]

@gino-m is this still considered a P-0? If so how do we unblock it?

[gino-m]

Updated limits:

	Tier
Tiered Survey organizer limits	Basic (Default)	Sponsored
Max. surveys per owner	5	100
Max. jobs per survey	5	10
Max. tasks per job	10	50
Max. photo tasks per job	1	10
Max. predefined sites (LOIs)	1,000	10000
Max. users in ACLs	10	50

Hard-coded Survey limits
Max. survey name len (chars)	100
Max, survey description (chars)	255
Max. job name len (chars)	100
Max. task instructions length (chars)	255
Max. instructions task length (char)	1024
Max. multiple choice option len (chars)	255
Max. LOI string property length	255

All of the above should be defined in Firebase config.

See also #2206