Adding -j1 for aidl-freeze-api

bpmodify isn't safe for multi processes env because it doesn't use any
lock mechanism even with -w option(in-place change)

So, added -j1 option as a temp solution.

Bug: 190577319
Bug: 229413853
Test: run aidl-freeze-api with -j1
Change-Id: I7fabfa1224ea0bb8d71538f4c8012255df28a3e8
diff --git a/finalize_branch_for_release.sh b/finalize_branch_for_release.sh
index c942eb2..8587b3a 100755
--- a/finalize_branch_for_release.sh
+++ b/finalize_branch_for_release.sh
@@ -17,7 +17,8 @@
 # Update references in the codebase to new API version (TODO)
 # ...
 
-AIDL_TRANSITIVE_FREEZE=true m aidl-freeze-api
+# Adding -j1 option because of file(Android.bp) race condition.
+AIDL_TRANSITIVE_FREEZE=true m aidl-freeze-api -j1
 
 m check-vndk-list || update-vndk-list.sh # for new versions of AIDL interfaces