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.cpp b/media/libaudiohal/impl/DevicesFactoryHalHidl.cpp
index 28001da..5d97000 100644
--- a/media/libaudiohal/impl/DevicesFactoryHalHidl.cpp
+++ b/media/libaudiohal/impl/DevicesFactoryHalHidl.cpp
@@ -20,8 +20,7 @@
 #define LOG_TAG "DevicesFactoryHalHidl"
 //#define LOG_NDEBUG 0
 
-#include <android/hardware/audio/2.0/IDevice.h>
-#include <android/hardware/audio/4.0/IDevice.h>
+#include PATH(android/hardware/audio/FILE_VERSION/IDevice.h)
 #include <media/audiohal/hidl/HalDeathHandler.h>
 #include <utils/Log.h>