Update androidx to AGP 7.0-alpha15

Test: ./gradlew bOS
Change-Id: Ic8a0c6197e92e958251ecce74e5585f55af2fbdb
diff --git a/testutils/testutils-mockito/build.gradle b/testutils/testutils-mockito/build.gradle
index 18aaea4..7582ccd 100644
--- a/testutils/testutils-mockito/build.gradle
+++ b/testutils/testutils-mockito/build.gradle
@@ -27,3 +27,9 @@
 
     implementation(KOTLIN_STDLIB)
 }
+
+android {
+    lintOptions {
+        disable "InvalidPackage" // Lint is unhappy about java.lang.instrument package
+    }
+}
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