Update Firebase Perf README (#7035)

Author: tejasd

firebase-perf/README.md

@@ -82,79 +82,20 @@ firebase-android-sdk$ ./gradlew :firebase-perf:deviceCheck
 
 ## Integrate SDK with 3P App
 
-### Creating a Release Candidate
-
-Change the version field in `gradle.properties` to reflect the RC status:
-
-```properties
-version=20.4.1-SNAPSHOT
-```
-
-And then generate the library with required libraries:
-
-```bash
-# firebase-perf requires firebase-sessions
-./gradlew -PprojectsToPublish="firebase-perf,firebase-sessions" firebasePublish
-```
-
-This will generate various files in the root build directory that align with
-the release candidates.
-
-Alternatively, you can just build the repository in isolation:
-```bash
-# firebase-perf requires firebase-sessions
-./gradlew -PprojectsToPublish="firebase-perf,firebase-sessions" buildMavenZip
-```
-
-### Publish project locally
-
-You can publish the project directly to your [local maven](https://docs.gradle.org/current/userguide/declaring_repositories.html#sub:maven_local) 
+You can publish the SDK directly to your [local maven](https://docs.gradle.org/current/userguide/declaring_repositories.html#sub:maven_local) 
 repository like so:
 
 ```bash
-# firebase-perf requires firebase-sessions
-./gradlew -PprojectsToPublish="firebase-perf,firebase-sessions" \
-    publishReleasingLibrariesToMavenLocal
+./gradlew :firebase-perf:publishToMavenLocal
 ```
 
 ### Read SDK from mavenLocal()
 
-Add **mavenLocal()** to your project-level `build.gradle` file
-
-```
-buildscript {
-    repositories {
-        mavenLocal()
-        google()
-        jcenter()
-    }
-   
-    dependencies {
-        .       .       .
-
-        # Adds several features that are specific to building Android apps
-        classpath 'com.android.tools.build:gradle:<agp-version>'
-
-        # Required for loading the 'google-services.json' file
-        classpath 'com.google.gms:google-services:<google-services-plugin-version>'
-
-        # Specify the version of 'perf-plugin'
-        classpath 'com.google.firebase:perf-plugin:<perf-plugin-version>'
-    }
-}
-
-allprojects {
-    repositories {
-        mavenLocal()
-        google()
-        jcenter()
-    }
-}
-```
+Add **mavenLocal()** to your project-level `build.gradle` file or `settings.gradle` file based on your app's set up.
 
-### Set Snapshot SDK version
+### Set Local SDK version
 
-Add **implementation** dependency to your module-level `build.gradle` file
+Add **implementation** dependency to your module-level `build.gradle` file, with the version as defined in `firebase-perf/gradle.properties`.
 
 ```
 apply plugin: 'com.android.application'
@@ -165,7 +106,7 @@ apply plugin: 'com.google.firebase.firebase-perf'
 .       .       .
 
 dependencies {
-   implementation 'com.google.firebase:firebase-perf:x.y.z-SNAPSHOT'
+   implementation 'com.google.firebase:firebase-perf:x.y.z'
 }
 ```