fix(profiling): PerfettoContinuousProfiler Reset shouldStop=false on startProfiler

shouldStop was always true, so we'd ever only collect max one
profile session (startProfiler(MANUAL)->stopProfiler(MANUAL)
plus one more chunk before profiler stopped itself.

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

@@ -93,6 +93,7 @@ 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;

sentry-android-core/src/test/java/io/sentry/android/core/PerfettoContinuousProfilerTest.kt

@@ -108,4 +108,29 @@ class PerfettoContinuousProfilerTest {
     verify(fixture.mockLogger)
       .log(eq(SentryLevel.WARNING), eq("SDK is rate limited. Stopping profiler."))
   }
+
+  @Test
+  fun `manual profiler can be started again after a full start-stop cycle`() {
+    // DeferredExecutorService captures scheduled runnables instead of waiting.
+    // executor.runAll() fires them immediately, simulating the 60s chunk timer elapsing.
+    val profiler = fixture.getSut()
+
+    // Session 1: start profiling, then stop it
+    profiler.startProfiler(ProfileLifecycle.MANUAL, fixture.mockTracesSampler)
+    assertTrue(profiler.isRunning)
+    profiler.stopProfiler(ProfileLifecycle.MANUAL)
+    // Simulate the 60s chunk timer firing — stopInternal(restartProfiler=true) runs,
+    // sees shouldStop=true, and does NOT restart. Profiler stops.
+    fixture.executor.runAll()
+    assertFalse(profiler.isRunning)
+
+    // Session 2: start profiling again
+    profiler.startProfiler(ProfileLifecycle.MANUAL, fixture.mockTracesSampler)
+    assertTrue(profiler.isRunning)
+    // Simulate the 60s chunk timer firing — stopInternal(restartProfiler=true) runs.
+    // shouldStop must have been reset to false by startProfiler, so the profiler
+    // should restart for the next chunk.
+    fixture.executor.runAll()
+    assertTrue(profiler.isRunning, "Profiler should continue running after chunk restart — shouldStop must be reset on start")
+  }
 }