Simpler default values for AudioStreamRandomizer

[RedMser]

AudioStreamRandomizer has two purposes:

• select from a list of audio streams
• randomize parameters like volume and pitch

Using this class for the first use-case means you will always have to reset the arbitrary default values of pitch and volume variation to 1 and 0 respectively.
And for the latter use-case, the defaults are chosen very arbitrary and will likely need to be adjusted anyway. So no time is saved by having values that aren't just 1 and 0 for them either.

[MewPurPur]

I totally agree with this in theory, but idk if it should be merged.

– Compatibility-breaking
+ The compatibility break is small and it's not going to break break any projects, just change their audio a tiny bit
+ The new default is better
– The old default may be suboptimal, but it's fairly reasonable.

[RedMser]

– Compatibility-breaking

I assumed unchanged default values of resources are still saved into the .res files. Is this not the case?
Even the extension API validator does not complain about this change.

[YuriSizov]

I assumed unchanged default values of resources are still saved into the .res files. Is this not the case?

Default values are not saved, no. That would bloat resources quite a lot, for every inherited type that they have.

[akien-mga]

Makes sense to me, those values were indeed quite arbitrary.

Needs to be documented clearly in the "Changed" section of the changelog.

[akien-mga]

Thanks!