[roll] Roll third_party/pigweed pw_tokenizer: Android.bp export headers and add base64 src

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/146492
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: c25426fb2e3c61e0ba39c1c1f4bbe60e853d7eb6
GitOrigin-RevId: 906ee3b8049927379350e0f8a70ca933cec3e5eb
Change-Id: I8bd6285298e6c3b91da0630ae8b323ecddc1506c
diff --git a/third_party/flower b/third_party/flower
index 66b28d0..0e2a238 100644
--- a/third_party/flower
+++ b/third_party/flower
@@ -457,7 +457,7 @@
              path="third_party/pigweed/src"
              remote="https://pigweed.googlesource.com/pigweed/pigweed"
              gerrithost="https://pigweed-review.googlesource.com"
-             revision="af25335e9d8a90c23cb8dcb42dda5c775e891414"/>
+             revision="c25426fb2e3c61e0ba39c1c1f4bbe60e853d7eb6"/>
     <project name="third_party/github.com/google/python_portpicker"
              gitsubmoduleof="fuchsia"
              path="third_party/python_portpicker/src"