BT: Fix BT turn on issues

Fix below two BT ON issues:
Issue1:
BT turn on fail after enable/disable BT quickly.

Steps to repo:
1. turn on BT
2. turn off BT immediately after wait for 2~3 second
3. turn on BT again

Observed Result: after step 3, BT turn on always failure
Expected Result: BT turn on successful.
Repro rate: 10/10

Root cause:
When turn on BT and disable it quickly, continueFromBleOnState() is
waiting for BT change to STATE_ON, then turn off it. But it doesn't
trigger BT transition to STATE_ON as mEnableExternal and
isBluetoothPersistedStateOnBluetooth are reset to false by disable().
It is stay in BLE ON till turned on again, change
to STATE_ON, then is turned off by continueFromBleOnState.

Fix solution:
If there is no any BLE app present and mEnableExternal is false,
move BT to OFF state from BLE_ON.

Issue2:
BT turn on unexpectedly after airplane mode on

Steps to repro:
1. Turn on BT
2. switch airplane mode on/off quickly, lastly keep airplane mode on

Observed Result:
BT turn on unexpectedly while airplane mode on

Expected Result:
BT turn off when airplane mode on

Repro rate: 2/10 times

Root Cause:
When airplane mode on, it is most likely that BT is opening.
For instance: STATE_BLE_TURNING_ON, STATE_TURNING_ON or STATE_OFF but mEnable is true.
Based on current implementation, BT will keep on after airplane mode on.

Fix solution:
Delayed turn off BT if it is opening when airplane mode on.

Change-Id: Iaaaf2785dc2b09867efbc801beb4c442aa11ada1
CRs-Fixed: 2723881,2727801

0 files changed, 0 insertions, 0 deletions