SF: Return EX_CONFIG_FAILED from setActiveConfigWithConstraints()

setActiveConfigWithConstraints() currently returns V2_4 Hal::Error
But with the new Composer3 IcomposerClient AIDL changes, it should
return int32_t corresponding the new EX_CONFIG_FAILED
exception. So define a new enum class Error to handle all V2_1  and 2_4
errors and the new IcomposerClient exception.

Also define a new class to return the result of initiateModeChange
as: Changed, Rejected, Aborted.

So change this plumbing through SF. Catch this error and propagate
up from DisplayModeController to SF using Scheduler

Bug: 374185540
Flag: EXEMPT refactor
Test: manual

Change-Id: I3548fd6bda806055fb071cc364d07d37b2693374
Signed-off-by: Manasi Navare <navaremanasi@google.com>
diff --git a/services/surfaceflinger/tests/unittests/HWComposerTest.cpp b/services/surfaceflinger/tests/unittests/HWComposerTest.cpp
index e0753a3..30bce2e 100644
--- a/services/surfaceflinger/tests/unittests/HWComposerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/HWComposerTest.cpp
@@ -69,7 +69,7 @@
 using ::testing::StrictMock;
 
 struct HWComposerTest : testing::Test {
-    using HalError = hardware::graphics::composer::V2_1::Error;
+    using HalError = hal::Error;
 
     Hwc2::mock::Composer* const mHal = new StrictMock<Hwc2::mock::Composer>();
     impl::HWComposer mHwc{std::unique_ptr<Hwc2::Composer>(mHal)};