Add prebuilt protobuf 3.9.1 to vendor partition.

Needed to work around a Qualcomm HAL prebuilt.

Bug: 203713560
Bug: 258322017
Test: Forrest
Change-Id: Iee9d43fa926002a04052a25226ba54da5f8cb0cf
(cherry picked from commit 112ddf05d3373283ef6e1021186615c449599fde)
Merged-In: Iee9d43fa926002a04052a25226ba54da5f8cb0cf
diff --git a/device-bramble.mk b/device-bramble.mk
index c028d9b..8d74f1e 100644
--- a/device-bramble.mk
+++ b/device-bramble.mk
@@ -203,3 +203,7 @@
 PRODUCT_PACKAGES += \
     NoCutoutOverlay \
     AvoidAppsInCutoutOverlay
+
+# Workaround for Qualcomm neural network HAL
+PRODUCT_PACKAGES += \
+    libprotobuf-cpp-full-3.9.1-vendorcompat