Remove '-f' from unzip command

The flag can cause files not to be extracted.

Test: ./art/test/testrunner/run_build_test_target.py -j50 art-linux-bionic-x64-zipapex
Change-Id: I16c7003a663e49248ca537135d2d55fa9d335c24
diff --git a/test/etc/run-test-jar b/test/etc/run-test-jar
index 8407b49..660c971 100755
--- a/test/etc/run-test-jar
+++ b/test/etc/run-test-jar
@@ -761,8 +761,8 @@
   if [ "$DEV_MODE" = "y" ]; then
     zip_options=""
   fi
-  setupapex_cmdline="unzip -o -f -u ${zip_options} ${ZIPAPEX_LOC} apex_payload.zip -d ${DEX_LOCATION}"
-  installapex_cmdline="unzip -o -f -u ${zip_options} ${DEX_LOCATION}/apex_payload.zip -d ${DEX_LOCATION}/zipapex"
+  setupapex_cmdline="unzip -o -u ${zip_options} ${ZIPAPEX_LOC} apex_payload.zip -d ${DEX_LOCATION}"
+  installapex_cmdline="unzip -o -u ${zip_options} ${DEX_LOCATION}/apex_payload.zip -d ${DEX_LOCATION}/zipapex"
   BIN_DIR=$DEX_LOCATION/zipapex/bin
 fi