build(deps): adopt android gradle plugin 8.2.1

note that the android gradle plugin 8.2-stable series has a defect
that does not allow setting the jacoco version, and pins it at 0.8.8

that is fine in all cases except where you want to use JDK21, which
requires jacoco 0.8.11+.

this will be resolved in android gradle plugin 8.3-stable

build.gradle

@@ -18,7 +18,7 @@ buildscript {
     ext.androidx_test_version = '1.5.0'
     ext.androidx_test_junit_version = '1.1.5'
     ext.robolectric_version = '4.11.1'
-    ext.android_gradle_plugin = "8.1.4"
+    ext.android_gradle_plugin = "8.2.1"
     ext.dokka_version = "1.9.10" // not the same with kotlin version!
     ext.uiautomator_version = "2.3.0-beta01"