Add preservingProtoFieldNames option

[jdbp-classpass]

As discussed on #2452, the upstream Google protobuf libraries (e.g. JsonFormat) can be configured to serialize with the unmodified field names from the proto files. Wire also supports this capability in Swift (

wire/wire-runtime-swift/src/main/swift/Codable/CodingUserInfoKey+Wire.swift

Lines 48 to 53 in ca1e09e

	public enum KeyNameEncodingStrategy {
	// Convert key names to `camelCase`
	case camelCase
	// Maintain the original field names, typically `snake_case`
	case fieldName
	}

) but not in Java.

Adding a preservingProtoFieldNames option to WireJsonAdapterFactory (Moshi) and WireTypeAdapterFactory (Gson) allows Wire's JSON implementation to be configured for field name preservation as well.

[jdbp-classpass]

@oldergod the tests are failing because adding the second boolean parameter is an ABI break. I can modify wire-gson-support/api/wire-gson-support.api etc to make the build pass but there is a risk if code compiled against the older version is linked against the newer version. What do you think the right thing to do here is?

[oldergod]

Let's dump the api ./gradlew apiDump and push. I think it's fine since we have the jmvoverloads

[oldergod]

Can you put them all back in the companion object?

[jdbp-classpass]

They need to be outside the companion object because loadJson now depends on the value of jsonLibrary.preservingProtoFieldNames, and jsonLibrary is a lateinit var (which is also why there's a get() on the val)

[oldergod]

Very sweet. Thank you