ANDROID: GKI: net: add vendor hooks for Http statistics

1.android_vh_tcp_clean_rtx_queue
When the acknowledged frames is removed from the retransmission queue, we will
record the rtt and check whether the Http statistics needs to be reported.

2.android_vh_tcp_rcv_synack
When a socket is in TCP_SYN_SENT state and acknowledgement is received on this
socket, we will check whether the Http statistics needs to be reported.

Bug: 353451545
Change-Id: I379852ee6b5ae3088dc4c2607ccf01e5e60cc5a7
Signed-off-by: Dezhi Huang <huangdezhi@hihonor.com>