Override TARGET_PRODUCT to FP3

This sets ro.product.{partition}.name to FP3 irrespective of our
custom build flavor.

Issue: FP3-A11#306
Test: adb shell getprop ro.build.fingerprint
Test: adb shell getprop ro.vendor.build.fingerprint
Change-Id: I26571d930e77cb97b19660ac7a201b4911672b3b
(cherry picked from commit 9c578ef652bd64d23ee18c1ae8a4fa5c32973215)
diff --git a/device.mk b/device.mk
index 732c996..2a870ce 100644
--- a/device.mk
+++ b/device.mk
@@ -33,7 +33,7 @@
 
 # Allow using custom and expressive names for our Android flavors while in fact
 # targeting the same model with all of them.
-PRODUCT_BUILD_PROP_OVERRIDES += PRODUCT_MODEL=FP3 PRODUCT_NAME=FP3
+PRODUCT_BUILD_PROP_OVERRIDES += PRODUCT_MODEL=FP3 PRODUCT_NAME=FP3 TARGET_PRODUCT=FP3
 
 # vendor/qcom/proprietary/common/config/device-vendor.mk --> PRODUCT_LIST
 TARGET_BASE_PRODUCT := FP3