Pin androidx.test dependencies in integration_test (#193316)

Even if these versions are cached - it still requires a network call
since they have the '+'. Remove the '+' and pin to a specific version.

Fixes: #193211

## Pre-launch Checklist

- [X] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
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responsibilities, or I am not using AI tools.
- [X] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [X] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [X] I signed the [CLA].
- [X] I listed at least one issue that this PR fixes in the description
above.
- [X] I updated/added relevant in-code documentation (doc comments with
`///`).
- [X] If this PR introduces a new feature or capability, I created and
linked a website documentation issue or PR in [flutter/website] (or
verified none is needed).
- [X] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [X] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [X] All existing and new tests are passing.

packages/integration_test/android/build.gradle.kts

diff --git a/packages/integration_test/android/build.gradle.kts b/packages/integration_test/android/build.gradle.kts
index 51132a4..3fd2f11 100644
--- a/packages/integration_test/android/build.gradle.kts
+++ b/packages/integration_test/android/build.gradle.kts
@@ -53,9 +53,9 @@
         testImplementation("junit:junit:4.13.2")
         testImplementation("org.mockito:mockito-core:5.8.0")
 
-        api("androidx.test:runner:1.2+")
-        api("androidx.test:rules:1.2+")
-        api("androidx.test.espresso:espresso-core:3.3+")
+        api("androidx.test:runner:1.3.0")
+        api("androidx.test:rules:1.2.0")
+        api("androidx.test.espresso:espresso-core:3.3.0")
 
         implementation("com.google.guava:guava:28.1-android")
     }