RN: Adds instructions for excluding the sentry-android-replay module from android targets (#14963)

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Adds instructions for excluding the sentry-android-replay module from
android targets

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The related PR
getsentry/sentry-react-native#5174
has been released in
https://github.com/getsentry/sentry-react-native/releases/tag/7.1.0

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Author: antonis

docs/platforms/react-native/session-replay/performance-overhead.mdx

@@ -59,4 +59,17 @@ To minimize the performance impact of the Replay SDK on iOS and Android, conside
   });
 ```
 
-Note that the default value for `replaysSessionQuality` is `medium` and a `high` quality setting is also available.
+Note that the default value for `replaysSessionQuality` is `medium` and a `high` quality setting is also available.
+
+## Excluding Session Replay from Android
+
+If you don’t plan to use Session Replay, you can exclude the sentry-android-replay module from your Android targets to reduce the bundle size by about 40KB compressed and 80KB uncompressed. Here's how you can do it:
+
+```gradle
+// from the android's root build.gradle file
+subprojects {
+  configurations.all {
+    exclude group: 'io.sentry', module: 'sentry-android-replay'
+  }
+}
+```