Add Bazel build.

I realize this will make upstreaming changes less likely.

At the moment, building requires Bazel 6.0.0-pre.20220421.3
due to bazelbuild/bazel#13989.

BUILD

@@ -0,0 +1,18 @@
+load("@build_bazel_rules_android//android:rules.bzl", "android_library")
+
+android_binary(
+  name = "markers",
+  srcs = glob(["src/**/*.java"]),
+  custom_package = "com.google.android.apps.markers",
+  manifest = "AndroidManifest.xml",
+  deps = [
+    ":resources",
+  ],
+)
+
+android_library(
+  name = "resources",
+  manifest = "AndroidManifest.xml",
+  custom_package = "org.dsandler.apps.markers",
+  resource_files = glob(["res/**"]),
+)

WORKSPACE

@@ -0,0 +1,16 @@
+# Load the Android build rules
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+http_archive(
+  name = "build_bazel_rules_android",
+  urls = ["https://github.com/bazelbuild/rules_android/archive/v0.1.1.zip"],
+  sha256 = "cd06d15dd8bb59926e4d65f9003bfc20f9da4b2519985c27e190cddc8b7a7806",
+  strip_prefix = "rules_android-0.1.1",
+)
+
+# Configure Android SDK Path
+load("@build_bazel_rules_android//android:rules.bzl", "android_sdk_repository")
+android_sdk_repository(
+  name = "androidsdk",
+  path = "/home/frank/Android/Sdk",
+)
+