libbinder_ndk: stronger APEX stability wording

As requestd.

Bug: 181551684
Test: N/A
Change-Id: I7b2a8f5f26f104b15d5e20ebc63cd0f515d4e4ff
diff --git a/libs/binder/ndk/include_platform/android/binder_manager.h b/libs/binder/ndk/include_platform/android/binder_manager.h
index 0668472..5516914 100644
--- a/libs/binder/ndk/include_platform/android/binder_manager.h
+++ b/libs/binder/ndk/include_platform/android/binder_manager.h
@@ -26,7 +26,7 @@
  * This registers the service with the default service manager under this instance name. This does
  * not take ownership of binder.
  *
- * WARNING: when using this API across an APEX boundary, it should only be used with stable
+ * WARNING: when using this API across an APEX boundary, do not use with unstable
  * AIDL services. TODO(b/139325195)
  *
  * \param binder object to register globally with the service manager.
@@ -42,7 +42,7 @@
  * service is not available This also implicitly calls AIBinder_incStrong (so the caller of this
  * function is responsible for calling AIBinder_decStrong).
  *
- * WARNING: when using this API across an APEX boundary, it should only be used with stable
+ * WARNING: when using this API across an APEX boundary, do not use with unstable
  * AIDL services. TODO(b/139325195)
  *
  * \param instance identifier of the service used to lookup the service.
@@ -54,7 +54,7 @@
  * it. This also implicitly calls AIBinder_incStrong (so the caller of this function is responsible
  * for calling AIBinder_decStrong).
  *
- * WARNING: when using this API across an APEX boundary, it should only be used with stable
+ * WARNING: when using this API across an APEX boundary, do not use with unstable
  * AIDL services. TODO(b/139325195)
  *
  * \param instance identifier of the service used to lookup the service.
@@ -87,7 +87,7 @@
  * This also implicitly calls AIBinder_incStrong (so the caller of this function is responsible
  * for calling AIBinder_decStrong).
  *
- * WARNING: when using this API across an APEX boundary, it should only be used with stable
+ * WARNING: when using this API across an APEX boundary, do not use with unstable
  * AIDL services. TODO(b/139325195)
  *
  * \param instance identifier of the service used to lookup the service.