Include Android.mk when building B4S4

[b1c1/b4s4 share codebase]
Include all Android.mk under hardware/qcom/sdm845 when building B4S4

Bug: 123477980
Change-Id: Id78ba3fee5e7a51036fac197401b7c51c9762d65
diff --git a/os_pickup.mk b/os_pickup.mk
index 6103ffb..8cc54b4 100644
--- a/os_pickup.mk
+++ b/os_pickup.mk
@@ -1,4 +1,4 @@
-ifeq ($(TARGET_BOARD_PLATFORM),sdm845)
+ifneq ($(filter sdm845 sdm710,$(TARGET_BOARD_PLATFORM)),)
 LOCAL_PATH := $(call my-dir)
 include $(call first-makefiles-under,$(LOCAL_PATH))
 endif