fix: improve Android benchmark result discovery in run_all.sh

Three issues fixed:
- Replace fragile -newer comparison against the script file (breaks
  after any script edit) with a timestamp file created just before the
  Gradle task runs.
- Search connected_android_test_additional_output for pulled benchmark
  JSON (where AndroidX Benchmark actually writes results via Gradle).
- Extract benchmark data from XML via CDATA parsing instead of dumping
  raw XML, consistent with the JVM and K/Native sections.

https://claude.ai/code/session_01WSNE6QKiYM2ZutQD2UihCW

quartz/benchmarks/run_all.sh

@@ -120,24 +120,48 @@ echo ""
 # ============================================================================
 if command -v adb &>/dev/null && adb devices 2>/dev/null | grep -q "device$"; then
     echo "=== Running Android benchmark (device detected) ==="
+    # Record start time so we can find results generated by this run.
+    ANDROID_STAMP="$WORK/.android_stamp"
+    touch "$ANDROID_STAMP"
+
     "$ROOT/gradlew" -p "$ROOT" :benchmark:connectedBenchmarkAndroidTest \
         -Pandroid.testInstrumentationRunnerArguments.class=com.vitorpamplona.quartz.benchmark.Secp256k1Benchmark \
         2>/dev/null || true
 
-    # AndroidX Benchmark writes test results XML
-    ANDROID_XML=$(find "$ROOT/benchmark/build" -path "*test-results*" -name "*.xml" \
-        -newer "$ROOT/quartz/benchmarks/run_all.sh" 2>/dev/null | head -1)
+    FOUND=false
+
+    # 1. Test-results XML (contains benchmark data in CDATA, like JVM results)
+    ANDROID_XML=$(find "$ROOT/benchmark/build" \
+        \( -path "*test-results*" -o -path "*androidTest-results*" \) \
+        -name "*.xml" -newer "$ANDROID_STAMP" 2>/dev/null | head -1)
     if [ -n "$ANDROID_XML" ] && [ -f "$ANDROID_XML" ]; then
-        cat "$ANDROID_XML"
-    else
-        # Try to find results from the sdcard benchmark output
+        sed -n '/<!\[CDATA\[/,/\]\]>/p' "$ANDROID_XML" | grep -v 'CDATA\|]]>'
+        FOUND=true
+    fi
+
+    # 2. Pulled benchmark JSON (AndroidX Benchmark writes here via Gradle)
+    if [ "$FOUND" = false ]; then
+        BENCH_JSON=$(find "$ROOT/benchmark/build/outputs" \
+            -path "*connected_android_test_additional_output*" \
+            -name "*.json" -newer "$ANDROID_STAMP" 2>/dev/null | head -1)
+        if [ -n "$BENCH_JSON" ] && [ -f "$BENCH_JSON" ]; then
+            cat "$BENCH_JSON"
+            FOUND=true
+        fi
+    fi
+
+    # 3. On-device benchmark JSON (legacy / older AndroidX Benchmark versions)
+    if [ "$FOUND" = false ]; then
         BENCH_JSON=$(adb shell "ls /sdcard/Download/*benchmark*json 2>/dev/null" 2>/dev/null | head -1 | tr -d '\r')
         if [ -n "$BENCH_JSON" ]; then
             adb shell "cat '$BENCH_JSON'" 2>/dev/null
-        else
-            echo "Android benchmark ran but results not found."
+            FOUND=true
         fi
     fi
+
+    if [ "$FOUND" = false ]; then
+        echo "Android benchmark ran but results not found."
+    fi
     echo ""
 else
     echo "=== Skipping Android benchmark (no device/emulator connected) ==="