Restore applypatch/updater/edify for non-A/B OTA support

Google deleted this source from bootable/recovery outright (commit c7ebad5f,
"rm -rf non-AB code", 2024-04-05) — confirmed present at android-14, absent
at android-16.0.0_r4. The runtime side (install.cpp's SetUpNonAbUpdateCommands)
and build-side packaging (ota_from_target_files.py's GenerateNonAbOtaPackage)
both survived; only the source that builds the update-binary executable
itself was removed. Sourced from TeamWin's android_bootable_recovery
(android-14.1), the only living copy found, with install/ZipUtil.cpp,
get_args.cpp, and set_metadata.cpp intentionally left out (only wired into
TeamWin's modified install.cpp, which PawletOS isn't adopting — twrpinstall
carries its own independent copies).

Kept as its own repo, not folded into a recovery fork, so it's buildable
independent of whichever recovery UI ends up in use.

updater/Android.bp

@@ -0,0 +1,209 @@
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["external_update_binary_updater_license"],
+}
+
+// external_update_binary is a standalone repo (not nested inside
+// bootable/recovery), so this declares its own license module instead of
+// depending on bootable/recovery's internal "bootable_recovery_license" name.
+license {
+    name: "external_update_binary_updater_license",
+    visibility: [":__subpackages__"],
+    license_kinds: [
+        "SPDX-license-identifier-Apache-2.0",
+    ],
+    license_text: [
+        "//external/update_binary:NOTICE",
+    ],
+}
+
+cc_defaults {
+    name: "libupdater_static_libs",
+
+    static_libs: [
+        "libapplypatch",
+        "libbootloader_message",
+        "libbspatch",
+        "libedify",
+        "libotautil",
+        "libext4_utils",
+        "libdm",
+        "libfec",
+        "libfec_rs",
+        "libavb",
+        "libverity_tree",
+        "liblog",
+        "liblp",
+        "libselinux",
+        "libsparse",
+        "libsquashfs_utils",
+        "libbrotli",
+        "libbz",
+        "libziparchive",
+        "libz",
+        "libbase",
+        "libcrypto_utils",
+        "libcutils",
+        "libutils",
+    ],
+    header_libs: [
+        "libgtest_prod_headers",
+    ],
+}
+
+cc_defaults {
+    name: "libupdater_defaults",
+
+    defaults: [
+        "recovery_defaults",
+        "libupdater_static_libs",
+    ],
+
+    shared_libs: [
+        "libcrypto",
+    ],
+}
+
+cc_defaults {
+    name: "libupdater_device_defaults",
+
+    static_libs: [
+        "libfs_mgr",
+        "libtune2fs",
+
+        "libext2_com_err",
+        "libext2_blkid",
+        "libext2_quota",
+        "libext2_uuid",
+        "libext2_e2p",
+        "libext2fs",
+    ],
+}
+
+cc_library_static {
+    name: "libupdater_core",
+
+    host_supported: true,
+
+    defaults: [
+        "recovery_defaults",
+        "libupdater_defaults",
+    ],
+
+    srcs: [
+        "blockimg.cpp",
+        "commands.cpp",
+        "install.cpp",
+        "mounts.cpp",
+        "updater.cpp",
+    ],
+
+    target: {
+        darwin: {
+            enabled: false,
+        },
+    },
+
+    export_include_dirs: [
+        "include",
+    ],
+}
+
+cc_library_static {
+    name: "libupdater_device",
+
+    defaults: [
+        "recovery_defaults",
+        "libupdater_defaults",
+        "libupdater_device_defaults",
+    ],
+
+    srcs: [
+        "dynamic_partitions.cpp",
+        "updater_runtime.cpp",
+        "updater_runtime_dynamic_partitions.cpp",
+    ],
+
+    static_libs: [
+        "libupdater_core",
+    ],
+
+    include_dirs: [
+        "external/e2fsprogs/misc",
+    ],
+
+    export_include_dirs: [
+        "include",
+    ],
+}
+
+cc_library_host_static {
+    name: "libupdater_host",
+
+    defaults: [
+        "recovery_defaults",
+        "libupdater_defaults",
+    ],
+
+    srcs: [
+        "build_info.cpp",
+        "dynamic_partitions.cpp",
+        "simulator_runtime.cpp",
+        "target_files.cpp",
+    ],
+
+    static_libs: [
+        "libupdater_core",
+        "libfstab",
+        "libc++fs",
+    ],
+
+    target: {
+        darwin: {
+            enabled: false,
+        },
+    },
+
+    export_include_dirs: [
+        "include",
+    ],
+}
+
+cc_binary_host {
+    name: "update_host_simulator",
+    defaults: ["libupdater_static_libs"],
+
+    srcs: ["update_simulator_main.cpp"],
+
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+
+    static_libs: [
+        "libupdater_host",
+        "libupdater_core",
+        "libcrypto_static",
+        "libfstab",
+        "libc++fs",
+    ],
+
+    target: {
+        darwin: {
+            enabled: false,
+        },
+    },
+}