Upgrade to a version of plexus-io from after a performance improvem…

…ent was restored.

(See codehaus-plexus/plexus-io#109.)

This CL _shouldn't_ make a performance difference because cl/650419894 _should_ have moved us to a version before the performance improvement was originally reverted. However, I messed that prior CL up, pinning us to the slow 3.4.1 instead of the fast 3.3.1. So in fact this CL _does_ improve performance back to the point it was at for 3.3.1. Today, that means an improvement from ~75s to ~1s for a clean `mvn source:jar-no-fork -f guava` on our Google workstations.

RELNOTES=n/a
PiperOrigin-RevId: 686509316

android/pom.xml

@@ -263,8 +263,8 @@
             <dependency>
               <groupId>org.codehaus.plexus</groupId>
               <artifactId>plexus-io</artifactId>
-              <!-- DO NOT UPGRADE this past 3.4.1 until https://github.com/codehaus-plexus/plexus-io/issues/109 is fixed (probably in 3.5.1). -->
-              <version>3.4.1</version>
+              <!-- We need at least 3.5.1 to avoid https://github.com/codehaus-plexus/plexus-io/issues/109. Once we upgrade maven-source-plugin itself to a version new enough to depend on 3.5.1 or higher, we can remove this override. -->
+              <version>3.5.1</version>
             </dependency>
           </dependencies>
         </plugin>

pom.xml

@@ -264,8 +264,8 @@
             <dependency>
               <groupId>org.codehaus.plexus</groupId>
               <artifactId>plexus-io</artifactId>
-              <!-- DO NOT UPGRADE this past 3.4.1 until https://github.com/codehaus-plexus/plexus-io/issues/109 is fixed (probably in 3.5.1). -->
-              <version>3.4.1</version>
+              <!-- We need at least 3.5.1 to avoid https://github.com/codehaus-plexus/plexus-io/issues/109. Once we upgrade maven-source-plugin itself to a version new enough to depend on 3.5.1 or higher, we can remove this override. -->
+              <version>3.5.1</version>
             </dependency>
           </dependencies>
         </plugin>