Do not enable HDR+ other than Pixel 2017

Bug: 70639754
Test: Build pass
Change-Id: Ie438ac704a7631ab8a32a1efdfea7c72692e6882
diff --git a/amber/camera/libhdrplusclient/Android.mk b/amber/camera/libhdrplusclient/Android.mk
index 18db0ac..249111a 100644
--- a/amber/camera/libhdrplusclient/Android.mk
+++ b/amber/camera/libhdrplusclient/Android.mk
@@ -29,9 +29,13 @@
 ifeq ($(wildcard vendor/google_easel),)
     LOCAL_CFLAGS += -DUSE_DUMMY_IMPL=1
 else
+ifneq ($(TARGET_EASEL_VARIANT), amber)
+    LOCAL_CFLAGS += -DUSE_DUMMY_IMPL=1
+else
     LOCAL_CFLAGS += -DUSE_DUMMY_IMPL=0
     LOCAL_SHARED_LIBRARIES += libhdrplusclientimpl
 endif
+endif
 
 LOCAL_HEADER_LIBRARIES := \
     libsystem_headers \