weblayer: directory cleanup

moves weblayer/shell/android/javatests to
weblayer/browser/android/javatests

My plan is to move weblayer/browser/java
into this directory next.

BUG=none
TEST=none

Change-Id: If442c9ebe6204a26038585e4fa53875c866a1fc8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1910814
Commit-Queue: Scott Violet <sky@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714624}

• BUILD.gn[diff]
• testing/buildbot/gn_isolate_map.pyl[diff]
• weblayer/browser/android/javatests/AndroidManifest.xml[Renamed from weblayer/shell/android/javatests/AndroidManifest.xml - diff]
• weblayer/browser/android/javatests/BUILD.gn[Added - diff]
• weblayer/browser/android/javatests/DEPS[Renamed from weblayer/shell/android/javatests/DEPS - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/BrowserFragmentLifecycleTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/BrowserFragmentLifecycleTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/DataClearingTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/DataClearingTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/DownloadCallbackTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/DownloadCallbackTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/EventUtils.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/EventUtils.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/ExecuteScriptTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/ExecuteScriptTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/FragmentRestoreTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/FragmentRestoreTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/FullscreenCallbackTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/FullscreenCallbackTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/InputTypesTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/InputTypesTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/InstrumentationActivityTestRule.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/InstrumentationActivityTestRule.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/NavigationTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/NavigationTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/NewTabCallbackImpl.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/NewTabCallbackImpl.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/NewTabCallbackTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/NewTabCallbackTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/ProfileTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/ProfileTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/RenderingTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/RenderingTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/SmokeTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/SmokeTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/TabCallbackTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/TabCallbackTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/TabListCallbackTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/TabListCallbackTest.java - diff]
• weblayer/browser/android/javatests/src/org/chromium/weblayer/test/TopControlsTest.java[Renamed from weblayer/shell/android/javatests/src/org/chromium/weblayer/test/TopControlsTest.java - diff]
• weblayer/shell/android/BUILD.gn[diff]