libeffects: Fixed bit mismatch seen with 3 channel input

The output for a 3 channel input is not bit-exact with that of
2 channel input when concert surround is enabled and tested using lvmtest.

Test: local native test (lvmtest)
Bug: 124085228
Change-Id: Icb2d1d5d858be0c37cb11dd3734f8a6244d3cc1c

media/libeffects/lvm/lib/Common/src/Copy_16.c

@@ -132,8 +132,8 @@ void Copy_Float_Stereo_Mc(const LVM_FLOAT *src,
     src += NrChannels * (NrFrames - 1);
     for (ii = NrFrames; ii != 0; ii--)
     {
-        dst[0] = src_st[0];
         dst[1] = src_st[1];
+        dst[0] = src_st[0]; // copy 1 before 0 is required for NrChannels == 3.
         for (jj = 2; jj < NrChannels; jj++)
         {
             dst[jj] = src[jj];

media/libeffects/lvm/tests/build_and_run_all_unit_tests.sh

@@ -54,21 +54,13 @@ fs_arr=(
     192000
 )
 
-ch_arr=(
-    1
-    2
-    4
-    6
-    8
-)
-
 # run multichannel effects at different configs, saving only the stereo channel
 # pair.
 for flags in "${flags_arr[@]}"
 do
     for fs in ${fs_arr[*]}
     do
-        for ch in ${ch_arr[*]}
+        for ch in {1..8}
         do
             adb shell $testdir/lvmtest -i:$testdir/sinesweepraw.raw \
                 -o:$testdir/sinesweep_$((ch))_$((fs)).raw -ch:$ch -fs:$fs $flags