Revert "alsa_sound: fix for SIP call mute issue."

This reverts commit f859d3e80b790d4b525515918f1c6889383cc495.

bug: 7250052
reopens-bug: 7213748
Change-Id: I33312c0be196b327887edc93c0b766bcf86a94bc
Signed-off-by: Iliyan Malchev <malchev@google.com>
diff --git a/alsa_sound/AudioStreamInALSA.cpp b/alsa_sound/AudioStreamInALSA.cpp
index 031d477..30de979 100644
--- a/alsa_sound/AudioStreamInALSA.cpp
+++ b/alsa_sound/AudioStreamInALSA.cpp
@@ -445,10 +445,6 @@
             else {
                 read += static_cast<ssize_t>((period_size));
                 read_pending -= period_size;
-                //Set mute by cleanning buffers read
-                if (mParent->mMicMute) {
-                    memset(buffer, 0, period_size);
-                }
                 buffer = ((uint8_t *)buffer) + period_size;
             }
 
@@ -495,6 +491,7 @@
                return NO_ERROR;
         }
         mParent->mVoipStreamCount = 0;
+        mParent->mVoipMicMute = 0;
 #ifdef QCOM_USBAUDIO_ENABLED
     } else {
         ALOGD("Deregistering REC bit, musbRecordingState:%d", mParent->musbRecordingState);