v1.2.2: Android Start crash fix + google_ip preservation + chromewebstore SNI

Three user-facing fixes:

- Android Start crash in google_only mode (#73): every early-return
  path in startEverything now satisfies Android 8+'s foreground-service
  contract by calling startForeground before stopSelf. Previously if
  you opened the app, selected google_only mode, and tapped Connect
  without filling deployment ID + auth key (which google_only doesn't
  need anyway), the service crashed with
  ForegroundServiceDidNotStartInTimeException. Also gated the
  deployment-ID requirement on mode == APPS_SCRIPT.

- google_ip auto-overwrite on Start (#71): some carriers serve poisoned
  DNS for www.google.com that resolves but refuses TLS, clobbering
  working IPs users had manually set. DNS lookup now only fires when
  the field is blank — manual configs are preserved across Connect.
  Explicit "Auto-detect" button still refreshes on demand.

- chromewebstore.google.com added to DEFAULT_GOOGLE_SNI_POOL and
  DEFAULT_SNI_POOL (#75). Same family as the rest of the pool —
  wildcard cert, GFE-hosted.

android/app/build.gradle.kts

@@ -14,8 +14,8 @@ android {
         applicationId = "com.therealaleph.mhrv"
         minSdk = 24 // Android 7.0 — covers 99%+ of live devices.
         targetSdk = 34
-        versionCode = 121
-        versionName = "1.2.1"
+        versionCode = 122
+        versionName = "1.2.2"
 
         // Ship all four mainstream Android ABIs:
         //   - arm64-v8a      — 95%+ of real-world Android phones since 2019