docs(testing): EMULATOR_GUIDE prerequisites, API 35, Apple Silicon; build.sh Android-only sync

EMULATOR_GUIDE.md:
- Add "Checking and Installing Prerequisites" (how to check Node, npm, Java,
  ANDROID_HOME, adb, emulator, AVDs; install steps; reference to
  scripts/check-environment.js)
- Use API 35 and Pixel8_API35 throughout to match project compileSdk/targetSdk
- Document arm64-v8a for Apple Silicon and x86_64 for Intel; add
  troubleshooting for "x86_64 not supported on aarch64 host"
- Bump version to 1.1.0 and last-updated date

test-apps/daily-notification-test/scripts/build.sh:
- When building only Android (--android / --run-android), run
  cap:sync:android instead of cap:sync so iOS pod install is skipped and
  Android build/run succeeds without fixing the iOS Podfile

test-apps/daily-notification-test/scripts/build.sh

@@ -220,11 +220,23 @@ if ! npm run build; then
 fi
 log_info "Web assets built successfully"
 
-# Step 2: Sync Capacitor
+# Step 2: Sync Capacitor (Android-only when building only Android to avoid iOS pod install failure)
 log_step "Syncing Capacitor with native projects..."
-if ! npm run cap:sync; then
-    log_error "Capacitor sync failed"
-    exit 1
+if [ "$BUILD_ALL" = true ]; then
+    if ! npm run cap:sync; then
+        log_error "Capacitor sync failed"
+        exit 1
+    fi
+elif [ "$BUILD_ANDROID" = true ]; then
+    if ! npm run cap:sync:android; then
+        log_error "Capacitor sync (Android) failed"
+        exit 1
+    fi
+elif [ "$BUILD_IOS" = true ]; then
+    if ! npm run cap:sync:ios; then
+        log_error "Capacitor sync (iOS) failed"
+        exit 1
+    fi
 fi
 log_info "Capacitor sync completed"