Upgrade AGP and Gradle

- Upgrade to Gradle 8.13 ./gradlew wrapper --gradle-version 8.13
- Add checksum to make sure valid distribution is used
- Upgrade AGP to 8.9.0

app/prodRelease-badging.txt

@@ -1,5 +1,5 @@
 package: name='com.google.samples.apps.nowinandroid' versionCode='8' versionName='0.1.2' platformBuildVersionName='15' platformBuildVersionCode='35' compileSdkVersion='35' compileSdkVersionCodename='15'
-sdkVersion:'21'
+minSdkVersion:'21'
 targetSdkVersion:'35'
 uses-permission: name='android.permission.INTERNET'
 uses-permission: name='android.permission.ACCESS_NETWORK_STATE'

gradle/libs.versions.toml

@@ -2,8 +2,8 @@
 accompanist = "0.37.0"
 androidDesugarJdkLibs = "2.1.4"
 # AGP and tools should be updated together
-androidGradlePlugin = "8.7.3"
-androidTools = "31.7.3"
+androidGradlePlugin = "8.9.0"
+androidTools = "31.9.0"
 androidxActivity = "1.9.3"
 androidxAppCompat = "1.7.0"
 androidxBrowser = "1.8.0"

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
+distributionSha256Sum=20f1b1176237254a6fc204d8434196fa11a4cfb387567519c61556e8710aed78
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

gradlew

@@ -86,8 +86,7 @@ done
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
 # Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
-' "$PWD" ) || exit
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum