prevent new more than one Resources for system

MIUI-28807

Change-Id: I65c7a87e0329f8379495b447a81781deb183e98b
Signed-off-by: mochangming <mochangming@xiaomi.com>
Add code in zygote to suppport network firewall.

MIUI-28912

Change-Id: I774f4bf03289cf9f74bd465d7cb33ea150946a50
Signed-off-by: mochangming <mochangming@xiaomi.com>
modify low memory notification style

Ref-Id: I6e7e89726d04ce963d2dece3f2ab24b2ee8fc2d9
Change-Id: I03031f05701dede519b118f4ff43b4b1b05fb604
Signed-off-by: mochangming <mochangming@xiaomi.com>
kill system application's backgroud process started by broadcast for more memory

MIUI-28628

Change-Id: I40903f1e30c4eaefb2bc8a1a86d6cdc63638e630
Signed-off-by: mochangming <mochangming@xiaomi.com>
The 3rd-party app can be deleted directlly even register as device manager.

MIUI-29021

Change-Id: I1640611d211d26893178a74f13c561a5525bef00
Signed-off-by: mochangming <mochangming@xiaomi.com>