Add missing break in order to avoid a fallthrough in setConcealMethod()

Test: atest DecoderTestXheAac ; atest DecoderTestAacDrc

Change-Id: I10da23ee81cfc48d4a67c25006e6fd48ed985c69
diff --git a/libAACdec/src/aacdecoder_lib.cpp b/libAACdec/src/aacdecoder_lib.cpp
index b528ef1..2860bf6 100644
--- a/libAACdec/src/aacdecoder_lib.cpp
+++ b/libAACdec/src/aacdecoder_lib.cpp
@@ -634,6 +634,7 @@
     switch (err) {
       case PCMDMX_INVALID_HANDLE:
         errorStatus = AAC_DEC_INVALID_HANDLE;
+        break;
       case PCMDMX_OK:
         break;
       default: