Revert "Make JAVA_HOME platform independent"

This reverts commit 613e72f.

android-sdk/Dockerfile

@@ -51,8 +51,7 @@ RUN mkdir -p ${ANDROID_HOME}/cmdline-tools && \
     rm *tools*linux*.zip
 
 # set the environment variables
-RUN JAVA_HOME=$(ls -d /usr/lib/jvm/java-${JDK_VERSION}-openjdk-* | head -n 1) && \
-    echo "export JAVA_HOME=$JAVA_HOME" > /tmp/java_home.sh
+ENV JAVA_HOME /usr/lib/jvm/java-${JDK_VERSION}-openjdk-amd64
 ENV GRADLE_HOME /opt/gradle
 ENV KOTLIN_HOME /opt/kotlinc
 ENV PATH ${PATH}:${GRADLE_HOME}/bin:${KOTLIN_HOME}/bin:${ANDROID_HOME}/cmdline-tools/latest/bin:${ANDROID_HOME}/cmdline-tools/tools/bin:${ANDROID_HOME}/platform-tools:${ANDROID_HOME}/emulator
@@ -94,9 +93,5 @@ RUN apt-get update && \
     done && \
     (rm /tmp/*.pub 2> /dev/null || true)
 
-ADD entrypoint.sh /tmp/entrypoint.sh
-RUN chmod +x /tmp/entrypoint.sh
-ENTRYPOINT ["/tmp/entrypoint.sh"]
-
 ADD supervisord.conf /etc/supervisor/conf.d/
 CMD ["/usr/bin/supervisord"]