Fix WindowContext leak
The root causes of this issue are:
1. WindowTokenClient#attachContext makes WindowTokenClient has strong
reference to WindowContext, which leads to WindowContext cannot be
GC'd.
2. WMS#removeWindowToken needs MANAGE_APP_TOKEN permission which
normal apps don't hold.
This CL does following things:
1. Use weak reference instead on WindowTokenClient#mContext.
2. Relax WMS#removeWindowToken to check callingUid if
MANAGE_WINDOW_TOKEN permission is not held
3. Deliver config changes to the client side in
WMS#addWindowTokenWithOption
4. Some minor fixes
fixes: 150812449
Bug: 150715095
Test: atest WindowContextTest
Test: atest WindowManagerServiceTests
Test: atest WindowTokenTests
Test: atest WindowManagerPermissionTests#testMANAGE_APP_TOKENS
Test: atest
WindowManagerPermissionTests#testADD_WINDOW_TOKEN_WITH_OPTIONS
Change-Id: I9f1d73af2abb78fc9844e6d9eb25e9f0293514e7
13 files changed