Revert "Migrate to our own SQL base and unit tests."

This reverts commit c9edadc.

Reason for revert: causing test failures: https://ci.chromium.org/ui/p/chromium/builders/ci/linux-cfm-rel/38119/overview

Original change's description:
> Migrate to our own SQL base and unit tests.
>
> This CL does several things:
> * Migrates to a new SQL base.
> * Split ImageInfo into two structs.
> * Moves the FilePathWorker to the AnnotationStorage's
> background sequence.
> * Adds unit test coverage for all the classes.
> * Connects the ImageAnnotationWorker to the ICA via
> mojo and uses it.
>
> images in MyFiles and unit tests."
>
> Test: "On DUT, manual search in the launcher for
> Bug: b:260646344
> Change-Id: I388caa354cbfaa0a286acbcd197c2fa1fb41ddbd
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4135755
> Reviewed-by: Andrew Moylan <amoylan@chromium.org>
> Commit-Queue: Dmitry Grebenyuk <dgrebenyuk@google.com>
> Reviewed-by: Tony Yeoman <tby@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1103545}

Bug: b:260646344
Change-Id: Ia6fd7d30015c9d564d0f0ddbeb89ee665bfa99db
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4237052
Auto-Submit: Phillis Tang <phillis@chromium.org>
Owners-Override: Phillis Tang <phillis@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1103568}

chrome/browser/ash/BUILD.gn

@@ -4767,9 +4767,6 @@ source_set("unit_tests") {
     "app_list/search/help_app_zero_state_provider_unittest.cc",
     "app_list/search/keyboard_shortcut_provider_unittest.cc",
     "app_list/search/keyboard_shortcut_result_unittest.cc",
-    "app_list/search/local_images/annotation_storage_unittest.cc",
-    "app_list/search/local_images/image_annotation_worker_unittest.cc",
-    "app_list/search/local_images/sql_database_unittest.cc",
     "app_list/search/omnibox/omnibox_answer_result_unittest.cc",
     "app_list/search/omnibox/omnibox_lacros_provider_unittest.cc",
     "app_list/search/omnibox/omnibox_provider_unittest.cc",