Add android::fs_mgr namespace for new Fstab code

Should have been done a while ago, but better late than never.

Test: treehugger
Change-Id: I0ea6e8d459cd3f3b3ce2d00a7a6a9786d52c52dd
diff --git a/init/builtins.cpp b/init/builtins.cpp
index 169edbe..9bedf40 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -75,6 +75,8 @@
 using namespace std::literals::string_literals;
 
 using android::base::unique_fd;
+using android::fs_mgr::Fstab;
+using android::fs_mgr::ReadFstabFromFile;
 
 #define chmod DO_NOT_USE_CHMOD_USE_FCHMODAT_SYMLINK_NOFOLLOW
 
diff --git a/init/first_stage_mount.cpp b/init/first_stage_mount.cpp
index 3a4dc6a..af2fdf1 100644
--- a/init/first_stage_mount.cpp
+++ b/init/first_stage_mount.cpp
@@ -49,6 +49,11 @@
 using android::fs_mgr::AvbHandle;
 using android::fs_mgr::AvbHashtreeResult;
 using android::fs_mgr::AvbUniquePtr;
+using android::fs_mgr::BuildGsiSystemFstabEntry;
+using android::fs_mgr::Fstab;
+using android::fs_mgr::FstabEntry;
+using android::fs_mgr::ReadDefaultFstab;
+using android::fs_mgr::ReadFstabFromDt;
 
 using namespace std::literals;
 
@@ -160,7 +165,7 @@
 // -----------------
 FirstStageMount::FirstStageMount(Fstab fstab)
     : need_dm_verity_(false), fstab_(std::move(fstab)), uevent_listener_(16 * 1024 * 1024) {
-    auto boot_devices = fs_mgr_get_boot_devices();
+    auto boot_devices = android::fs_mgr::GetBootDevices();
     device_handler_ = std::make_unique<DeviceHandler>(
             std::vector<Permissions>{}, std::vector<SysfsPermissions>{}, std::vector<Subsystem>{},
             std::move(boot_devices), false);
diff --git a/init/ueventd.cpp b/init/ueventd.cpp
index 7545d53..399ea4c 100644
--- a/init/ueventd.cpp
+++ b/init/ueventd.cpp
@@ -245,7 +245,7 @@
     uevent_handlers.emplace_back(std::make_unique<DeviceHandler>(
             std::move(ueventd_configuration.dev_permissions),
             std::move(ueventd_configuration.sysfs_permissions),
-            std::move(ueventd_configuration.subsystems), fs_mgr_get_boot_devices(), true));
+            std::move(ueventd_configuration.subsystems), android::fs_mgr::GetBootDevices(), true));
     uevent_handlers.emplace_back(std::make_unique<FirmwareHandler>(
             std::move(ueventd_configuration.firmware_directories)));