Cherry pick PR #1329: Change libopus to not export symbols #753

Job	Run time
android-arm64 / initialize	37s
android-arm / initialize	49s
android-x86 / initialize	41s
android-arm64 / docker-build-image	30s
android-arm64 / docker-unittest-image	0s
android-x86 / docker-build-image	30s
android-x86 / docker-unittest-image	0s
android-arm / docker-build-image	32s
android-arm / docker-unittest-image	0s
android-x86 / x86_devel	16m 4s
android-x86 / x86_debug	29m 17s
android-x86 / x86_qa	6m 54s
android-x86 / x86_gold	7m 23s
android-arm / arm_devel	25m 36s
android-arm / arm_debug	16m 8s
android-arm / arm_qa	8m 20s
android-arm / arm_gold	6m 58s
android-arm64 / arm64_devel	28m 42s
android-arm64 / arm64_debug	24m 55s
android-arm64 / arm64_qa	7m 54s
android-arm64 / arm64_gold	7m 2s
android-arm / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
android-arm / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
android-arm / on-host-unit-test-report	0s
android-arm64 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
android-arm64 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
android-arm64 / on-host-unit-test-report	0s
android-x86 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
android-x86 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
android-x86 / on-host-unit-test-report	0s
	3h 8m 52s

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