Jason Simmons 5463140ef4 Simplify conversion of numeric types in the message codec on iOS (flutter/engine#7097)
Consistently handle Int32/Int64 types on both 32-bit and 64-bit versions
of iOS.  Drop usage of the obsolete hex string encoding for BigInt types.

Fixes https://github.com/flutter/flutter/issues/21313
2018-12-17 15:54:57 -08:00
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