Improve documentation

* Revise the recommended bazel version in README.md
* Add a disclaimer in the README for protobuf C++ minimum version
* Add more detail to bzlmod rules_android setup in the release notes.

PiperOrigin-RevId: 793810183
Change-Id: I6b5fbf3e7c24f7be7d7e87506dfd6b11d86a2d31

Author: ted-xie

.github/workflows/release_prep.sh

@@ -35,7 +35,17 @@ cat << EOF
 2. Add to your \`MODULE.bazel\` file:
 
 \`\`\`starlark
+# See examples/basicapp/MODULE.bazel.
 bazel_dep(name = "rules_android", version = "${TAG:1}")
+remote_android_extensions = use_extension(
+    "@rules_android//bzlmod_extensions:android_extensions.bzl",
+    "remote_android_tools_extensions")
+use_repo(remote_android_extensions, "android_tools")
+
+android_sdk_repository_extension = use_extension("@rules_android//rules/android_sdk_repository:rule.bzl", "android_sdk_repository_extension")
+use_repo(android_sdk_repository_extension, "androidsdk")
+
+register_toolchains("@androidsdk//:sdk-toolchain", "@androidsdk//:all")
 \`\`\`
 
 ## Using WORKSPACE

README.md

@@ -2,14 +2,16 @@
 
 ## Disclaimer
 
-NOTE: This branch is a development preview of the Starlark implementation of Android rules for Bazel. This code is incomplete and may not function as-is.
+NOTE: This branch is a development preview of the Starlark implementation of
+Android rules for Bazel. This code is incomplete and may not function as-is.
 
-A version of Bazel built at or near head or a recent pre-release and the following flags are necessary to use these rules:
+A recent version of Bazel (7.4+, 8.0+, HEAD, Bazel 9 pre-release) is required.
 
-```
---experimental_enable_android_migration_apis
---experimental_google_legacy_api
-```
+This ruleset depends on [Protobuf](https://github.com/protocolbuffers/protobuf),
+which has a minimum C++ language level of 17 (as of Protobuf v30, ~2025 Q3).
+Depending on your system's compiler version, you may have to set `-std=c++17`
+in your C++ toolchain arguments. This repository's .bazelrc file provides a
+minimal set of Bazel configuration flags to build an Android app.
 
 ## Overview
 
@@ -94,8 +96,6 @@ use_repo(android_sdk_repository_extension, "androidsdk")
 register_toolchains("@androidsdk//:sdk-toolchain", "@androidsdk//:all")
 ```
 
-
-
 Then, in your BUILD files, import and use the rules:
 
 ```starlark