Update setup-android action to v4.0.1

[brandonpage]

Summary

• update android-actions/setup-android from v3.2.2 to v4.0.1 in the reusable library and UI workflows
• retain immutable SHA pinning and document the human-readable version beside each pin
• install only platform-tools so the action does not request the removed legacy tools SDK package

Context

The previous action defaulted to packages: tools platform-tools. Current Android SDK repository metadata no longer resolves tools, causing every job to fail during Setup Android SDK before Gradle or tests run.

Validation

• verified the v4.0.1 tag points to 40fd30fb8d7440372e1316f5d1809ec01dcd3699
• parsed both modified workflow files as YAML
• git diff --check passes

[brandonpage]

CI note: this repository runs PR checks via pull_request_target, and the job log shows the reusable workflows are loaded from refs/heads/dev at 412a7b21d, not from this PR head. Therefore this PR run still executes setup-android v3.2.2 with its tools platform-tools default and is expected to reproduce the existing Setup Android SDK failure. The v4.0.1 pin and packages: platform-tools override cannot take effect in PR CI until the reusable workflow change is present on dev or tested from a branch-triggered workflow.