Build input-related HAL code for host

This would allow to run some of the tests on host, which is sometimes
convenient when a device is not readily available.

Bug: 249591924
Test: atest --host inputflinger_tests
Change-Id: Ide39bc4beb5174191bdc31e0a9b9f905622fcde5
diff --git a/input/common/aidl/Android.bp b/input/common/aidl/Android.bp
index 390d8b5..95a14b2 100644
--- a/input/common/aidl/Android.bp
+++ b/input/common/aidl/Android.bp
@@ -9,6 +9,7 @@
 
 aidl_interface {
     name: "android.hardware.input.common",
+    host_supported: true,
     vendor_available: true,
     srcs: ["android/hardware/input/common/*.aidl"],
     stability: "vintf",
diff --git a/input/processor/aidl/Android.bp b/input/processor/aidl/Android.bp
index 354816e..773bb49 100644
--- a/input/processor/aidl/Android.bp
+++ b/input/processor/aidl/Android.bp
@@ -9,6 +9,7 @@
 
 aidl_interface {
     name: "android.hardware.input.processor",
+    host_supported: true,
     vendor_available: true,
     srcs: ["android/hardware/input/processor/*.aidl"],
     imports: [