set api level 17

Author: vmutafov

scripts/build.sh

@@ -13,7 +13,7 @@ GN_ARGS_BASE="
   use_custom_libcxx=false
   icu_use_data_file=false
   treat_warnings_as_errors=false
-  default_min_sdk_version=21
+  default_min_sdk_version=17
   symbol_level=0
   v8_enable_v8_checks=false
   v8_enable_debugging_features=false