ANDROID: GKI: ASoC: jack: Fix buttons enum value

Microphone2 and SND_JACK_BTN_5 enum are same, resulting
in SND_JACK_BTN_5 event getting triggered when ANC headset
is plugged into the device.
Use unique values in sound jack type enum.

Test: build
Bug: 151372815
Change-Id: I668e50afcad11b1f62f511f4241f79bad858c7d2
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>
(cherry picked from commit ce59edee66bf7ce6ea7d0baee51c2cbd18685521)
Signed-off-by: Hridya Valsaraju <hridya@google.com>