Revert "bpf: change NetBpfLoad rc file from 33 (T/U) to 31 (S/Sv2/T/U)"

This reverts commit 0e9b0e05c69e0b06c88c688832e18c6ecdd939c4.

Reason for revert: needs a .31rc specific version instead.
Will merge the required changes into the followup commit.

Change-Id: I01e9dfee4aaabc3ddab39da7519b7d9963b84124
diff --git a/Tethering/apex/Android.bp b/Tethering/apex/Android.bp
index 3e7c697..19dd492 100644
--- a/Tethering/apex/Android.bp
+++ b/Tethering/apex/Android.bp
@@ -111,7 +111,7 @@
     ],
     prebuilts: [
         "current_sdkinfo",
-        "netbpfload.31rc",
+        "netbpfload.33rc",
         "netbpfload.35rc",
         "ot-daemon.34rc",
     ],