libhwbinder: explicit log for frozen process

This error is ambiguous without the log, and it logged
before this case was split from the default case.

Bug: 333689623
Test: N/A
Change-Id: Idecf6a9466919dc52cb43ecbf578b96d0be4a3a3
diff --git a/IPCThreadState.cpp b/IPCThreadState.cpp
index 7393cb6..881d997 100644
--- a/IPCThreadState.cpp
+++ b/IPCThreadState.cpp
@@ -823,6 +823,7 @@
             goto finish;
 
         case BR_FROZEN_REPLY:
+            ALOGW("Transaction failed because process frozen.");
             err = FAILED_TRANSACTION;
             goto finish;