libaudiohal: Factorize more between version

Use macro in include to avoid duplicating all the headers.
That will be useful when a third version is added.

Bug: 118203066
Test: compile
Change-Id: I8972b9ac9d098b32c9e7de48ff0544440c29adbf
Signed-off-by: Kevin Rocard <krocard@google.com>
diff --git a/media/libaudiohal/impl/DevicesFactoryHalHidl.h b/media/libaudiohal/impl/DevicesFactoryHalHidl.h
index a4282b0..27e0649 100644
--- a/media/libaudiohal/impl/DevicesFactoryHalHidl.h
+++ b/media/libaudiohal/impl/DevicesFactoryHalHidl.h
@@ -17,8 +17,7 @@
 #ifndef ANDROID_HARDWARE_DEVICES_FACTORY_HAL_HIDL_H
 #define ANDROID_HARDWARE_DEVICES_FACTORY_HAL_HIDL_H
 
-#include <android/hardware/audio/2.0/IDevicesFactory.h>
-#include <android/hardware/audio/4.0/IDevicesFactory.h>
+#include PATH(android/hardware/audio/FILE_VERSION/IDevicesFactory.h)
 #include <media/audiohal/DevicesFactoryHalInterface.h>
 #include <utils/Errors.h>
 #include <utils/RefBase.h>