audio VTS: Exclude '1' from 'invalid' buffer size list

This affects AudioStream{In|Out}.OpenInvalidBufferSize test.
Leave only values that are obviously invalid.

Bug: 205884982
Test: atest VtsHalAudioCoreTargetTest
Change-Id: I148b823761175959a1cf658599c038378ac4b116
diff --git a/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp b/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
index 50fb981..12b10a6 100644
--- a/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
+++ b/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
@@ -1899,9 +1899,7 @@
         }
         WithStream<Stream> stream(portConfig.value());
         ASSERT_NO_FATAL_FAILURE(stream.SetUpPortConfig(module.get()));
-        // The buffer size of 1 frame should be impractically small, and thus
-        // less than any minimum buffer size suggested by any HAL.
-        for (long bufferSize : std::array<long, 4>{-1, 0, 1, std::numeric_limits<long>::max()}) {
+        for (long bufferSize : std::array<long, 3>{-1, 0, std::numeric_limits<long>::max()}) {
             EXPECT_STATUS(EX_ILLEGAL_ARGUMENT, stream.SetUpNoChecks(module.get(), bufferSize))
                     << "for the buffer size " << bufferSize;
             EXPECT_EQ(nullptr, stream.get());