deps android: Upgrade Gradle to 8.9, the latest

Release notes:
  https://docs.gradle.org/8.7/release-notes.html
  https://docs.gradle.org/8.8/release-notes.html
  https://docs.gradle.org/8.9/release-notes.html

Some highlights:
  * 8.7 "Support for building projects with Java 22"
  * 8.8 "Full Java 22 support"
  * 8.9 "Error and warning reporting improvements"

[greg: One other notable theme in the 8.7 and 8.8 release notes
 is caching improvements.  Hopefully our builds might get faster.]

Author: rajveermalviya

android/gradle/wrapper/gradle-wrapper.properties

@@ -6,7 +6,7 @@
 #  the wrapper is the one from the new Gradle too.)
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-all.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME