Android: Extend Android SDK sanity

Verify the essential tools and packages required for development

Task-number: QTCREATORBUG-18837
Change-Id: Ie89e8fcf3bf75f1db9cc5eac50859cf6f3e5fafd
Reviewed-by: BogDan Vatra <bogdan@kdab.com>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>

src/plugins/android/androidconfigurations.h

@@ -113,6 +113,7 @@ public:
     Utils::FileName sdkLocation() const;
     void setSdkLocation(const Utils::FileName &sdkLocation);
     QVersionNumber sdkToolsVersion() const;
+    QVersionNumber buildToolsVersion() const;
 
     Utils::FileName ndkLocation() const;
     QVersionNumber ndkVersion() const;