recovery: Implement a volume manager

This is a copy of the pre-binderized vold which has been converted to
use direct calls instead of sockets and stripped down to only what is
needed to support recovery.

Includes:
  * Replace security_context_t type

    security_context_t has been marked as deprecated in libselinux from
    version 3.2. Update to the `char*` type.

    Bug: 190808996
    Test: m
    Change-Id: I6f40e161251c79893d41e12c368715736578aacc

  * recovery: volmgr: remove unused IsSupported

    Change-Id: If8206658fdfb6108221806c09c99bf0a30f4a586
    Signed-off-by: Jesse Chan <jc@lineageos.org>

  * recovery: volmgr: remove filesystem checks

    Those checks are not strictly necessary and we are
    not building fsck tools for recovery for now.

    Remove those checks so volmgr can be useful.

    Change-Id: I87756c61b933b6cdccd281c6276b686fbd36019f
    Signed-off-by: Jesse Chan <jc@lineageos.org>

  * recovery: fixup `EmulatedVolume creating`

    Avoid dangling pointer. Instead of pointing to FstabEntry create copy.

    Change-Id: I57f76006db09a6add2c173f43175f0f6b848d87b

  * recovery: fix volmgr cleaning up

    Don't reset pointer to netlink manager
    Delete disks in stop() rather then in ~VolumeManager
    Call destroy() before deleting disks cause delete expects the
      disk to be destroyed
    Clear the lists or we would read garbage data on the next scan

    Change-Id: Idadfa1f33b7cb5f2f3c780848a99344a6608420e

  * recovery: handle interrupts in apply update menu

    Change-Id: I1f78f9196634353b77986545332d7d52a5f0c161

Change-Id: Ic82d929e052b5ba70ecf7b475e0a223d77d9687e
diff --git a/volume_manager/Android.bp b/volume_manager/Android.bp
new file mode 100644
index 0000000..0c5f50b
--- /dev/null
+++ b/volume_manager/Android.bp
@@ -0,0 +1,60 @@
+//
+// Copyright (C) 2019 The LineageOS 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.
+//
+
+cc_library_shared {
+    name: "libvolume_manager",
+    recovery_available: true,
+    srcs: [
+        "Disk.cpp",
+        "DiskPartition.cpp",
+        "EmulatedVolume.cpp",
+        "NetlinkHandler.cpp",
+        "NetlinkManager.cpp",
+        "Process.cpp",
+        "PublicVolume.cpp",
+        "Utils.cpp",
+        "VolumeBase.cpp",
+        "VolumeManager.cpp",
+        "fs/Exfat.cpp",
+        "fs/Ext4.cpp",
+        "fs/F2fs.cpp",
+        "fs/Ntfs.cpp",
+        "fs/Vfat.cpp",
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    include_dirs: [
+        "external/gptfdisk",
+    ],
+    shared_libs: [
+        "libbase",
+        "libcutils",
+        "libdiskconfig",
+        "liblog",
+        "libselinux",
+        "libsgdisk",
+        "libsysutils",
+    ],
+    static_libs: [
+        "libfs_mgr",
+        "libfstab",
+        "libext2_blkid",
+        "libext2_uuid",
+    ],
+    export_include_dirs: ["include"],
+}