monitoring: build latest taler-android then same adb pay smoke

Add run-android-build-and-smoke.sh (assembleFdroidDebug from
taler-android master) and wire APK_PATH/PKG into the existing smoke.

scripts/taler-monitoring/android-test/run-android-build-and-smoke.sh

@@ -0,0 +1,93 @@
+#!/usr/bin/env bash
+# Build the **latest** GNU Taler Android wallet from source, then run the same
+# adb deep-link smoke as run-android-pay-smoke.sh.
+#
+# Source (default): $HOME/taler/taler-android  (git@git.taler.net:taler-android.git)
+# Build:            ./gradlew :wallet:assembleFdroidDebug
+# Package id:       net.taler.wallet.fdroid.debug
+#
+# No root required if ANDROID_HOME points at a user SDK ($HOME/Android/Sdk).
+#
+# Usage:
+#   ./android-test/run-android-build-and-smoke.sh
+#   STACK=goa ./android-test/run-android-build-and-smoke.sh
+#   STACK=stage SKIP_PULL=1 ./android-test/run-android-build-and-smoke.sh
+#   TALER_ANDROID_SRC=/path/to/taler-android ./android-test/run-android-build-and-smoke.sh
+#
+set -euo pipefail
+ROOT=$(cd "$(dirname "$0")" && pwd)
+SMOKE="$ROOT/run-android-pay-smoke.sh"
+SRC="${TALER_ANDROID_SRC:-$HOME/taler/taler-android}"
+SKIP_PULL="${SKIP_PULL:-0}"
+VARIANT="${VARIANT:-fdroidDebug}"   # assemble task suffix: FdroidDebug / NightlyDebug / …
+export ANDROID_HOME="${ANDROID_HOME:-$HOME/Android/Sdk}"
+export ANDROID_SDK_ROOT="${ANDROID_SDK_ROOT:-$ANDROID_HOME}"
+
+if [ ! -x "$SRC/gradlew" ]; then
+  echo "taler-android not found at $SRC (set TALER_ANDROID_SRC=…)" >&2
+  exit 2
+fi
+if [ ! -d "$ANDROID_HOME" ]; then
+  echo "ANDROID_HOME missing: $ANDROID_HOME" >&2
+  exit 2
+fi
+
+printf 'sdk.dir=%s\n' "$ANDROID_HOME" >"$SRC/local.properties"
+
+cd "$SRC"
+if [ "$SKIP_PULL" != "1" ] && [ -d .git ]; then
+  echo "git pull --ff-only origin $(git rev-parse --abbrev-ref HEAD)"
+  git pull --ff-only origin "$(git rev-parse --abbrev-ref HEAD)" || \
+    git fetch origin && git merge --ff-only "origin/$(git rev-parse --abbrev-ref HEAD)" || true
+fi
+COMMIT=$(git rev-parse --short=12 HEAD 2>/dev/null || echo unknown)
+echo "source: $SRC @ $COMMIT"
+echo "variant: assemble${VARIANT^}" 2>/dev/null || true
+
+# Map VARIANT → gradle task (fdroidDebug → assembleFdroidDebug)
+task="assemble$(printf '%s' "$VARIANT" | python3 -c 'import sys; s=sys.stdin.read().strip(); print(s[:1].upper()+s[1:] if s else "FdroidDebug")')"
+# Prefer explicit known tasks
+case "$VARIANT" in
+  fdroidDebug|FdroidDebug) task=assembleFdroidDebug ;;
+  fdroidRelease|FdroidRelease) task=assembleFdroidRelease ;;
+  nightlyDebug|NightlyDebug) task=assembleNightlyDebug ;;
+  googleDebug|GoogleDebug) task=assembleGoogleDebug ;;
+esac
+
+# Low-RAM hosts: cap JVM (override GRADLE_OPTS to raise)
+export GRADLE_OPTS="${GRADLE_OPTS:--Xmx1280m -Dorg.gradle.daemon=false -Dorg.gradle.workers.max=1}"
+echo "gradle :wallet:$task …"
+./gradlew ":wallet:$task" --no-daemon --max-workers="${GRADLE_MAX_WORKERS:-1}" \
+  -Dorg.gradle.jvmargs="${GRADLE_JVMARGS:--Xmx1280m}"
+
+# Locate APK
+APK=$(find "$SRC/wallet/build/outputs/apk" -name '*.apk' -type f 2>/dev/null | sort | tail -1)
+if [ -z "$APK" ] || [ ! -f "$APK" ]; then
+  echo "no APK under wallet/build/outputs/apk" >&2
+  exit 4
+fi
+echo "built apk: $APK ($(wc -c <"$APK") bytes)"
+
+# Package id from aapt if available
+PKG="${PKG:-}"
+if [ -z "$PKG" ] && command -v aapt >/dev/null 2>&1; then
+  PKG=$(aapt dump badging "$APK" 2>/dev/null | sed -n "s/^package: name='\([^']*\)'.*/\1/p" | head -1)
+fi
+: "${PKG:=net.taler.wallet.fdroid.debug}"
+
+mkdir -p "$ROOT/apks"
+STAMP_APK="$ROOT/apks/wallet-from-source-${COMMIT}.apk"
+cp -f "$APK" "$STAMP_APK"
+echo "copied → $STAMP_APK"
+echo "$COMMIT" >"$ROOT/out/build-commit.txt" 2>/dev/null || mkdir -p "$ROOT/out" && echo "$COMMIT" >"$ROOT/out/build-commit.txt"
+echo "$APK" >"$ROOT/out/build-apk-path.txt"
+
+# Same smoke as published F-Droid path
+export APK_PATH="$STAMP_APK"
+export APK_NAME="$(basename "$STAMP_APK")"
+export PKG
+export OUT_DIR="${OUT_DIR:-$ROOT/out-source}"
+mkdir -p "$OUT_DIR"
+echo "=== smoke with built APK (PKG=$PKG) ==="
+exec env APK_DIR="$ROOT/apks" APK_NAME="$APK_NAME" PKG="$PKG" OUT_DIR="$OUT_DIR" \
+  "$SMOKE"