Well I found a sort-of solution: If I go into my build.gradle and set my compileSdkVersion to be something other than 19 the error messages go away.
apply plugin: 'android'
android {
compileSdkVersion 17
buildToolsVersion '19.0.2'
...
Obviously this isn't a very good solution, I'm going to try removing SDK 19 and re-adding it to see if it will resolve the issue for that SDK.