Add a skeleton "http_profile" package #838

Job	Run time
mono_repo self validate	19s
analyze_and_format; Dart 2.19.0; PKG: pkgs/http_client_conformance_tests; `dart analyze --fatal-i...	6m 49s
analyze_and_format; Dart 3.0.0; PKGS: pkgs/http, pkgs/http_profile; `dart analyze --fatal-infos`	29s
analyze_and_format; Dart dev; PKGS: pkgs/http, pkgs/http_client_conformance_tests, pkgs/http_prof...	48s
analyze_and_format; Dart dev; PKGS: pkgs/http, pkgs/http_client_conformance_tests, pkgs/http_prof...	33s
unit_test; Dart 3.0.0; PKG: pkgs/http; `dart run --define=no_default_http_client=true test/no_def...	29s
unit_test; Dart dev; PKG: pkgs/http; `dart run --define=no_default_http_client=true test/no_defau...	29s
unit_test; Dart 3.0.0; PKGS: pkgs/http, pkgs/http_profile; `dart test --platform vm`	1m 2s
unit_test; Dart 3.0.0; PKG: pkgs/http; `dart test --platform chrome`	2m 21s
unit_test; Dart dev; PKG: pkgs/http; `dart test --platform chrome`	2m 38s
unit_test; Dart dev; PKGS: pkgs/http, pkgs/http_profile; `dart test --platform vm`	1m 3s
	17m 0s

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