fix: session-start hook fails silently when dl.google.com is blocked

The Claude Code web egress proxy does not include dl.google.com in its
allowlist, causing the session-start hook to abort entirely (due to
set -euo pipefail) when Android SDK downloads fail. This cascading
failure also prevented local.properties creation and ANDROID_HOME export.

Additionally, JAVA_TOOL_OPTIONS contains nonProxyHosts entries for
*.google.com and *.googleapis.com, which causes the JVM to bypass the
proxy for Google Maven, resulting in connection failures.

Changes:
- Remove set -euo pipefail; use per-section error handling instead
- Fix JAVA_TOOL_OPTIONS: strip *.google.com from nonProxyHosts
- Fix no_proxy: remove *.google.com and *.googleapis.com entries
- Move local.properties and env exports before SDK download section
- Make SDK downloads non-fatal with clear warning messages
- Install standalone ktlint as fallback for spotlessApply
- Create spotless-apply wrapper script for proxy-blocked environments
- Update Stop hook to fall back to spotless-apply when Gradle fails

https://claude.ai/code/session_01HeWiRdKDTnMGfEBUegk3d1

.claude/settings.json

@@ -16,7 +16,7 @@
         "hooks": [
           {
             "type": "command",
-            "command": "./gradlew spotlessApply",
+            "command": "./gradlew spotlessApply 2>/dev/null || spotless-apply",
             "timeout": 120
           }
         ]