Slim recent panel

* Add Slim recent panel.
    Dependency repo: platform_frameworks_opt_cards
* Add scale mode.
    Allow user to scale recent panel size down.
* Add lefty mode.
    Allow recent panel to show up on the left edge
    instead of the right edge for left handed people.
* Add favorite mode.
    Keep favorite tasks in the task list when clear all.
* Fix recent thumbnail click/dismiss animation.
* Fix random FC on pinch.
* Add always show translucent decor on recents panel.

Slim最近应用面板

* 添加Slim最近应用面板.
    依赖repo: platform_frameworks_opt_cards
* 添加缩放模式.
    允许用户缩小最近应用面板尺寸.
* 添加左利手模式.
    允许最近应用面板从左侧出现(而不是从右侧),
    方便左利手用户操作.
* 添加星标模式.
    清除全部任务时保留加星标的任务.
* 修复最近应用面板缩略图 点击/清除 的动画.
* 修复捏合手势时的FC.
* 添加最近应用面板始终显示半透明装饰栏(即通知栏和导航栏).

Kudos to SlimRoms for the awesome original implementation.
向SlimsRoms对此功能的原创实现致以崇高的敬意.

Reference commits:
参考commits:
SlimRoms/frameworks_base@760413134a5efe60c1d4473322e467152d71c80b
SlimRoms/frameworks_base@a1b3aa9eb2a74c4c7c167906e5c8c3081db1ccdb
SlimRoms/frameworks_base@9c1c3c0955d51adc589ec6fbb667a0ae482de24e
SlimRoms/frameworks_base@3fd2bf959f8279ebfb65c55e157c19f72526c751
SlimRoms/frameworks_base@72ce3bbd3a117572e85a9837eceaaca191c86f3a
SlimRoms/frameworks_base@fb32d4cb2303e354fadb5ecc3d12d223edf40c3b
SlimRoms/frameworks_base@0347f610f048699157af5b958729a76dcc8f09c7
SlimRoms/frameworks_base@c6deddcaa57de4b418f8e1eee607b45b99c1671d
SlimRoms/frameworks_base@d0f982c4a9d551a9b76c55a7c8e9150cb650c085
SlimRoms/frameworks_base@247961e595003c7b62f8acd5d1074585b5421b03
SlimRoms/frameworks_base@64f9878a99b7574cb9130bf17b50ffd24213a59f
SlimRoms/frameworks_base@d2a76f297efe0285ac53e8fc63c45fbad131d2a4
SlimRoms/frameworks_base@189127bceed4e8295241328ed6ae046cd606ad25
SlimRoms/frameworks_base@4d10958b149a99bf6fb76f904b7f2f14dfd68aaa
SlimRoms/frameworks_base@9398710a50b9dd78ba70064b8b699e6c87e2f86f
SlimRoms/frameworks_base@cc525c326f61f741917af841041f736992028405
SlimRoms/frameworks_base@6c7aa01ec52ec527fd7b0fba64edbe065993c9d3