Changed sdk version

Dockerfile

-FROM openjdk:8-jdk as builder
+FROM openjdk:8 as builder
 
 # define arguments for versions to be used for platform and build tools
 ARG PLATFORM=30
@@ -19,7 +19,7 @@ RUN android-sdk-linux/tools/bin/sdkmanager \
         "extras;google;m2repository" \
         "extras;android;m2repository" > /dev/null
 
-FROM openjdk:11-jdk
+FROM openjdk:8
 COPY --from=builder /android-sdk-linux /android-sdk-linux
 ENV PATH=$PATH:$ANDROID_HOME/platform-tools/
 ENV ANDROID_SDK_ROOT=$PWD/android-sdk-linux