Set JAVA_HOME used when running in the integration branch

Test: CI

Change-Id: I51d7cf817d26a50f6d922709465d6142358ff6f5
diff --git a/androidx-studio-integration.sh b/androidx-studio-integration.sh
index 68f47ec..8ca488e 100755
--- a/androidx-studio-integration.sh
+++ b/androidx-studio-integration.sh
@@ -19,7 +19,7 @@
 export LINT_VERSION=`grep -oP "(?<=baseVersion = ).*" tools/buildSrc/base/version.properties`
 export LINT_REPO="$(pwd)/out/repo"
 
-tools/gradlew -p tools/metalava \
+JAVA_HOME="$(pwd)/prebuilts/jdk/jdk11/linux-x86/" tools/gradlew -p tools/metalava \
   --no-daemon \
   --stacktrace \
    --dependency-verification=off \