fix: gradle error when compileSdk or targetSdk is provided (#1825)

Author: farfromrefug

test-app/app/build.gradle

@@ -77,8 +77,8 @@ def METADATA_JAVA_OUT = "mdg-java-out.txt"
 def pluginsJarLibraries = new LinkedList<String>()
 def allJarLibraries = new LinkedList<String>()
 
-def computeCompileSdkVersion = { -> project.hasProperty("compileSdk") ? compileSdk : NS_DEFAULT_COMPILE_SDK_VERSION as int }
-def computeTargetSdkVersion = { -> project.hasProperty("targetSdk") ? targetSdk : NS_DEFAULT_COMPILE_SDK_VERSION as int }
+def computeCompileSdkVersion = { -> project.hasProperty("compileSdk") ? compileSdk as int : NS_DEFAULT_COMPILE_SDK_VERSION as int }
+def computeTargetSdkVersion = { -> project.hasProperty("targetSdk") ? targetSdk as int : NS_DEFAULT_COMPILE_SDK_VERSION as int }
 def computeMinSdkVersion = { -> project.hasProperty("minSdk") ? minSdk : NS_DEFAULT_MIN_SDK_VERSION as int }
 def computeBuildToolsVersion = { ->
     project.hasProperty("buildToolsVersion") ? buildToolsVersion : NS_DEFAULT_BUILD_TOOLS_VERSION as String