Remove IPlatformServices.GetHash

[mattleibow]

Description of Change

Remove the usage of IPlatformServices.GetHash in favo[u]r of the IHashAlgorithm service.

Part of #1965

Additions made

• Adds IHashAlgorithm
• Depends on Add ApplicationHandler #2653

PR Checklist

• Targets the correct branch
• Tests are passing (or failures are unrelated)
• Targets a single property for a single control (or intertwined few properties)
• Adds the property to the appropriate interface
• Avoids any changes not essential to the handler property
• Adds the mapping to the PropertyMapper in the handler
• Adds the mapping method to the Android, iOS, and Standard aspects of the handler
• Implements the actual property updates (usually in extension methods in the Platform section of Core)
• Tags ported renderer methods with [PortHandler]
• Adds an example of the property to the sample project (MainPage)
• Adds the property to the stub class
• Implements basic property tests in DeviceTests

Does this PR touch anything that might affect accessibility?

• Does this PR introduce a new control? (If yes, add an example using SemanticProperties to the SemanticsPage)
• APIs that modify focusability?
• APIs that modify any text property on a control?
• Does this PR modify view nesting or view arrangement in anyway?
• Is there the smallest possibility that your PR will change accessibility?
• I'm not sure, please help me

If any of the above checkboxes apply to your PR, then the PR will need to provide testing to demonstrate that accessibility still works.

[Redth]

Feeling a bit conflicted on this one... Do we really need this to be a service? The Crc64 algorithm is pretty settled on in terms of what we're going to use long term. Android team did some testing on this when we were replacing Md5 usages and this was a pretty efficient method to use.

I think we should also avoid the terminology of hash here, as the intent is very specifically for non-cryptographic hashing purposes and having a service named for hashing could be a bit ambiguous and imply something it's not.

I think we should drop the whole service/interface for this, and just make it:

public static class Crc64
{
    public byte[] Compute(byte[] input) { /* .. */ }
    public byte[] Compute(Stream inputStream) { /* .. */ }
    public string Compute(string input) { /* .. */ }
}