build(deps): bump androidGradlePlugin from 8.6.1 to 8.7.0

Fixes NewApi warning on `removeLast()`

https://developer.android.com/about/versions/15/behavior-changes-15?hl=en#:~:text=The%20new%20SequencedCollection,has%20been%20disabled.

Bumps `androidGradlePlugin` from 8.6.1 to 8.7.0.

Updates `com.android.application` from 8.6.1 to 8.7.0

Updates `com.android.library` from 8.6.1 to 8.7.0

---
updated-dependencies:
- dependency-name: com.android.application
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: com.android.library
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

AnkiDroid/src/main/java/com/ichi2/libanki/sched/DeckNode.kt

@@ -121,7 +121,7 @@ data class DeckNode(
         }
         if (node.level > 0 && startingLen == list.size) {
             // we don't include ourselves if no children matched
-            list.removeLast()
+            list.removeAt(list.lastIndex)
         }
     }
 

gradle/libs.versions.toml

@@ -10,7 +10,7 @@ acra = '5.11.4'
 #
 # Old changelogs - See 'Table of Contents' in sidebar
 # https://developer.android.com/build/releases/past-releases
-androidGradlePlugin = "8.6.1"
+androidGradlePlugin = "8.7.0"
 # https://developer.android.com/jetpack/androidx/releases/activity
 androidxActivity = "1.9.2"
 # https://developer.android.com/jetpack/androidx/releases/annotation