axolotl: Build fingerprint service from source

Change-Id: I30cb563bed46a0b48ad9e0e49b95021d38ce00d2
diff --git a/device.mk b/device.mk
index 3f84937..3165fd6 100644
--- a/device.mk
+++ b/device.mk
@@ -182,6 +182,10 @@
     f2fs_io \
     sg_write_buffer \
 
+# Fingerprint
+PRODUCT_PACKAGES += \
+    android.hardware.biometrics.fingerprint@2.1-service \
+
 # FM packages
 PRODUCT_PACKAGES += \
     FM2 \