fix(profiling): Move shouldStop reset inside !isRunning() guard

shouldStop = false was unconditionally set at the top of startProfiler,
which could cancel a pending stop if startProfiler was called on an
early-return path (e.g. MANUAL while already running). Move the reset
to inside the !isRunning() block so it only triggers when the profiler
is actually about to start.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 43jay

sentry-android-core/src/main/java/io/sentry/android/core/PerfettoContinuousProfiler.java

@@ -107,7 +107,6 @@ public void startProfiler(
       final @NotNull ProfileLifecycle profileLifecycle,
       final @NotNull TracesSampler tracesSampler) {
     try (final @NotNull ISentryLifecycleToken ignored = lock.acquire()) {
-      shouldStop = false;
       if (shouldSample) {
         isSampled = tracesSampler.sampleSessionProfile(SentryRandom.current().nextDouble());
         shouldSample = false;
@@ -132,6 +131,7 @@ public void startProfiler(
       }
       if (!isRunning()) {
         logger.log(SentryLevel.DEBUG, "Started Profiler.");
+        shouldStop = false;
         startInternal();
       }
     }