Extend generate_startup_descriptors.py to app bundles

Change-Id: Id2e97a31481e40f22bc9fcdea0f116e6e1b0eef4
diff --git a/tools/utils.py b/tools/utils.py
index ecd172c..9bd518f 100644
--- a/tools/utils.py
+++ b/tools/utils.py
@@ -23,6 +23,8 @@
 TOOLS_DIR = defines.TOOLS_DIR
 REPO_ROOT = defines.REPO_ROOT
 THIRD_PARTY = defines.THIRD_PARTY
+BUNDLETOOL_JAR_DIR = os.path.join(THIRD_PARTY, 'bundletool/bundletool-1.11.0')
+BUNDLETOOL_JAR = os.path.join(BUNDLETOOL_JAR_DIR, 'bundletool-all-1.11.0.jar')
 ANDROID_SDK = os.path.join(THIRD_PARTY, 'android_sdk')
 MEMORY_USE_TMP_FILE = 'memory_use.tmp'
 DEX_SEGMENTS_RESULT_PATTERN = re.compile('- ([^:]+): ([0-9]+)')