dexopt: Restore old files when cancelled

- out_oat, out_vdex, out_image will be first updated upon
  temporary work file. When dex2oat is completed, this temp
  file is committed and renamed into regular file.
- For whatever reason, if renaming fails, guarantee three states:
  all files committed to new version
  all files kept with original version
  all three files removed
- reference_profile is kept for cancellation or successful run
  while removed for dexopt failure.
- Added RestorableFile to handle usage for out_* files.
- Added unit test.
- Also fixed wrong returning of completed state for cancellation.

Bug: 203689833
Bug: 32230521
Test: atest installd_unique_file_test installd_dexopt_test
Change-Id: Ib6804fb311596dfd9180c1d6083cd2e9a661b621
diff --git a/cmds/installd/tests/Android.bp b/cmds/installd/tests/Android.bp
index 4cde7e3..51f7716 100644
--- a/cmds/installd/tests/Android.bp
+++ b/cmds/installd/tests/Android.bp
@@ -188,3 +188,23 @@
         "libotapreoptparameters",
     ],
 }
+
+cc_test {
+    name: "installd_file_test",
+    test_suites: ["device-tests"],
+    clang: true,
+    srcs: ["installd_file_test.cpp"],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    shared_libs: [
+        "libbase",
+        "libcutils",
+        "libutils",
+    ],
+    static_libs: [
+        "libinstalld",
+        "liblog",
+    ],
+}