COMPMID-2663: Interface to unbound mappings.

Adds an interface to ILifetimeManager to unbound a list of mappings.

Change-Id: I927fa1e0f83e6be778fd36794439f51d36dde408
Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1988
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/runtime/ISimpleLifetimeManager.h b/arm_compute/runtime/ISimpleLifetimeManager.h
index 4384283..7ba11cc 100644
--- a/arm_compute/runtime/ISimpleLifetimeManager.h
+++ b/arm_compute/runtime/ISimpleLifetimeManager.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 ARM Limited.
+ * Copyright (c) 2017-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -57,6 +57,7 @@
 
     // Inherited methods overridden:
     void register_group(IMemoryGroup *group) override;
+    bool release_group(IMemoryGroup *group) override;
     void start_lifetime(void *obj) override;
     void end_lifetime(void *obj, IMemory &obj_memory, size_t size, size_t alignment) override;
     bool are_all_finalized() const override;