chore(deps): bump exoplayer_version from 2.17.1 to 2.18.0 in /app

Bumps `exoplayer_version` from 2.17.1 to 2.18.0.

Updates `exoplayer-core` from 2.17.1 to 2.18.0
- [Release notes](https://github.com/google/ExoPlayer/releases)
- [Changelog](https://github.com/google/ExoPlayer/blob/release-v2/RELEASENOTES.md)
- [Commits](https://github.com/google/ExoPlayer/compare/r2.17.1...r2.18.0)

Updates `extension-okhttp` from 2.17.1 to 2.18.0
- [Release notes](https://github.com/google/ExoPlayer/releases)
- [Changelog](https://github.com/google/ExoPlayer/blob/release-v2/RELEASENOTES.md)
- [Commits](https://github.com/google/ExoPlayer/compare/r2.17.1...r2.18.0)

---
updated-dependencies:
- dependency-name: com.google.android.exoplayer:exoplayer-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: com.google.android.exoplayer:extension-okhttp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

app/build.gradle

@@ -190,7 +190,7 @@ dependencies {
 
     //media
     implementation("androidx.media:media:1.6.0")
-    def exoplayer_version = '2.17.1'
+    def exoplayer_version = '2.18.0'
     implementation("com.google.android.exoplayer:exoplayer-core:$exoplayer_version")
     implementation("com.google.android.exoplayer:extension-okhttp:$exoplayer_version")