4107 [flutter_plugin_tools] Move license-check tests to runCapturingPrint (cla: yes, waiting for tree to go green)

4110 [flutter_plugin_tools] ignore flutter_plugin_tools when publishing (cla: yes, waiting for tree to go green)

4113 [in_app_purchase] Initialize SKError with correct data type (cla: yes, waiting for tree to go green, p: in_app_purchase, platform-ios)

4114 [in_app_purchase] Added priceCurrencySymbol to SkuDetailsWrapper (cla: yes, waiting for tree to go green, p: in_app_purchase, platform-android)

4115 [in_app_purchase] Add currencySymbol to ProductDetails (cla: yes, waiting for tree to go green, p: in_app_purchase)