Update protolog stacktrace trim amount

Test: atest InternalTests:com.android.internal.protolog.PerfettoProtoLogImplTest#stackTraceTrimmed

Flag: EXEMPT bug fix
Change-Id: I56d10f5a783ecc3b2a32fafe6ac1f13930712626
diff --git a/core/java/com/android/internal/protolog/PerfettoProtoLogImpl.java b/core/java/com/android/internal/protolog/PerfettoProtoLogImpl.java
index 4aeee6c..cbcbf2db 100644
--- a/core/java/com/android/internal/protolog/PerfettoProtoLogImpl.java
+++ b/core/java/com/android/internal/protolog/PerfettoProtoLogImpl.java
@@ -736,7 +736,7 @@
         return UUID.nameUUIDFromBytes(fullStringIdentifier.getBytes()).getMostSignificantBits();
     }
 
-    private static final int STACK_SIZE_TO_PROTO_LOG_ENTRY_CALL = 12;
+    private static final int STACK_SIZE_TO_PROTO_LOG_ENTRY_CALL = 6;
 
     private String collectStackTrace() {
         StackTraceElement[] stackTrace =  Thread.currentThread().getStackTrace();