memory leak fix

Author: Shahroz16

location/src/main/kotlin/io/customer/location/LocationLifecycleObserver.kt

@@ -2,6 +2,7 @@ package io.customer.location
 
 import androidx.lifecycle.DefaultLifecycleObserver
 import androidx.lifecycle.LifecycleOwner
+import java.lang.ref.WeakReference
 
 /**
  * Manages location lifecycle tied to app foreground/background transitions.
@@ -11,25 +12,33 @@ import androidx.lifecycle.LifecycleOwner
  *   when [trackingMode] is [LocationTrackingMode.ON_APP_START].
  * - [onStop]: cancels any in-flight GPS request when the app enters background.
  *
+ * Uses a [WeakReference] to [LocationServicesImpl] so that [ProcessLifecycleOwner]
+ * (which lives for the entire process) does not prevent SDK cleanup. When the SDK
+ * is reset via [CustomerIO.clearInstance], the services become eligible for GC,
+ * the weak reference clears, and this observer becomes a no-op.
+ *
  * Thread safety: all lifecycle callbacks are delivered on the main thread
  * by [ProcessLifecycleOwner], so no synchronization is needed.
  */
 internal class LocationLifecycleObserver(
-    private val locationServices: LocationServicesImpl,
+    locationServices: LocationServicesImpl,
     private val trackingMode: LocationTrackingMode
 ) : DefaultLifecycleObserver {
 
+    private val servicesRef = WeakReference(locationServices)
     private var hasRequestedOnStart = false
 
     override fun onStart(owner: LifecycleOwner) {
+        val services = servicesRef.get() ?: return
         if (trackingMode == LocationTrackingMode.ON_APP_START && !hasRequestedOnStart) {
             hasRequestedOnStart = true
-            locationServices.requestLocationUpdate()
+            services.requestLocationUpdate()
         }
     }
 
     override fun onStop(owner: LifecycleOwner) {
-        val wasCancelled = locationServices.cancelInFlightRequest()
+        val services = servicesRef.get() ?: return
+        val wasCancelled = services.cancelInFlightRequest()
         // If the GPS request was still in flight when we backgrounded,
         // allow onStart to retry on the next foreground entry.
         if (wasCancelled) {