Fix compilation when macro HWC_DEVICE_API_VERSION_0_1 defined

[energycsdx]

compilation in previous android versions is broken by 3f20184

[morphis]

LGTM

[Tofee]

Hello,
This commit breaks the build where HWC_DEVICE_API_VERSION_0_1 isn't defined and where the corresponding types are absent from android headers. Indeed, hwcomposer_backend_v0.h uses some of them, like "hwc_composer_device_t", so this header should not be parsed at all.
I'll try to find some time to prepare a PR, but in the meantime my proposal is to have the following patch:

 diff --git a/hwcomposer/hwcomposer_backend_v0.cpp b/hwcomposer/hwcomposer_backend_v0.cpp
index d40a6b3..6eed37c 100644
--- a/hwcomposer/hwcomposer_backend_v0.cpp
+++ b/hwcomposer/hwcomposer_backend_v0.cpp
@@ -40,8 +40,9 @@
 ****************************************************************************/
 #include <android-version.h>
 #if ANDROID_VERSION_MAJOR <= 4
-#include "hwcomposer_backend_v0.h"
+#include <hardware/hwcomposer_defs.h>
 #ifdef HWC_DEVICE_API_VERSION_0_1
+#include "hwcomposer_backend_v0.h"
 
 
 HwComposerBackend_v0::HwComposerBackend_v0(hw_module_t *hwc_module, hw_device_t *hw_device)