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)
1 file changed