Delete try-finally beacuse calling finishInputEvent twice will cause 'Native Crash'

If there is an exception, finishInputEvent method will be called, then NativeInputEventReceiver also send finish signal,will cause a native crash,'Abort message: 'Could not find consume time for seq=xxxx'

[1] https://cs.android.com/android/platform/superproject/+/master:frameworks/base/core/jni/android_view_InputEventReceiver.cpp;l=441?q=InputEventRe&ss=android%2Fplatform%2Fsuperproject:frameworks%2F
[2] https://cs.android.com/android/platform/superproject/+/master:frameworks/native/libs/input/InputTransport.cpp;l=1259?q=InputTRAN&ss=android%2Fplatform%2Fsuperproject:frameworks%2F



Bug: 169866723
Test: atest InputEventSenderAndReceiverTest
Signed-off-by: chenxinyu <chenxinyu7@xiaomi.com>
Change-Id: Ib834e2a960741f7fa33a0661c67f305af0db517a