Re-adds a trace point that was accidentally removed.

Test: Built and collected a trace to verify slice ended
Bug: 146614089
Change-Id: Ic75d65fc7b2a417fc3a58c2df8ec9deb795fb418
Merged-In: Ic75d65fc7b2a417fc3a58c2df8ec9deb795fb418

core/java/com/android/internal/os/Zygote.java

@@ -660,6 +660,8 @@ public final class Zygote {
 
             disableExecuteOnly(args.mTargetSdkVersion);
 
+            Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
+
             return ZygoteInit.zygoteInit(args.mTargetSdkVersion,
                     args.mDisabledCompatChanges,
                     args.mRemainingArgs,