Type parameters not properly resolved in string interpolations

[DartBot]

This issue was originally filed by @mhausner

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The code below should result in a compilation error but instead the compiler generates a getter call get:T

class C<T> {
  test() {
    try {
      "$T";
    } catch (var ok) {
      print(ok);
    }
  }
}

co19 test: Language/10_Expressions/05_Strings/1_String_Interpolation_A01_t06.dart

$ dart src/d2/dart/tests/co19/src/Language/10_Expressions/05_Strings/1_String_Interpolation_A01_t06.dart
NoSuchMethodException : method not found: 'get:T'
Receiver: Instance of 'C<Dynamic>'
Arguments: []

[DartBot]

This comment was originally written by @mhausner

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Fix out for review.

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Added Started label.

[DartBot]

This comment was originally written by @mhausner

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Fixed in CL 6645.

[DartBot]

This comment was originally written by @mhausner

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Added Fixed label.