Save snap fraction after PIP transition is completed

HandleBoundsEvents can be called multiple times during a commit
process in exo, and we want to save PIP snap fraction once
everything gets stable after PIP transition.

Note Chrome PIP remembers its position by itself, so it's safe
to move the code to exo.

BUG=b:156888408
TEST=atest android.server.am.ActivityManagerPinnedStackTests
     #testEnterPictureInPictureSavePosition

Change-Id: I655af04dfc9b4880411b6bb110fbb5781fe28c68
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2215655
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Commit-Queue: Kazuki Takise <takise@chromium.org>
Auto-Submit: Kazuki Takise <takise@chromium.org>
Cr-Commit-Position: refs/heads/master@{#772530}
5 files changed
tree: 44cb947f0e6558ec96a58fb0075bd293457f8de1
  1. android_webview/
  2. apps/
  3. ash/
  4. base/
  5. build/
  6. build_overrides/
  7. buildtools/
  8. cc/
  9. chrome/
  10. chromecast/
  11. chromeos/
  12. cloud_print/
  13. components/
  14. content/
  15. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. jingle/
  31. media/
  32. mojo/
  33. native_client_sdk/
  34. net/
  35. pdf/
  36. ppapi/
  37. printing/
  38. remoting/
  39. rlz/
  40. sandbox/
  41. services/
  42. skia/
  43. sql/
  44. storage/
  45. styleguide/
  46. testing/
  47. third_party/
  48. tools/
  49. ui/
  50. url/
  51. weblayer/
  52. .clang-format
  53. .clang-tidy
  54. .eslintrc.js
  55. .git-blame-ignore-revs
  56. .gitattributes
  57. .gitignore
  58. .gn
  59. .vpython
  60. .vpython3
  61. .yapfignore
  62. AUTHORS
  63. BUILD.gn
  64. CODE_OF_CONDUCT.md
  65. codereview.settings
  66. DEPS
  67. ENG_REVIEW_OWNERS
  68. LICENSE
  69. LICENSE.chromium_os
  70. OWNERS
  71. PRESUBMIT.py
  72. PRESUBMIT_test.py
  73. PRESUBMIT_test_mocks.py
  74. README.md
  75. WATCHLISTS
README.md

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