Remove obsolete code for config splits

Bazel support was never launched, and aapt1 is already obsolete.

Most of the deleted logic (SplitConfigurationFilter) deals with inferring a
split's configuration from its filename, but the right way is to read this
directly from its manifest:
* https://android.googlesource.com/platform/frameworks/base/+/refs/tags/platform-tools-29.0.2/tools/aapt2/cmd/Util.cpp#219

PiperOrigin-RevId: 263009083

src/test/java/com/google/devtools/build/android/BUILD

@@ -257,20 +257,6 @@ java_test(
     ],
 )
 
-java_test(
-    name = "SplitConfigurationFilterTest",
-    size = "small",
-    srcs = ["SplitConfigurationFilterTest.java"],
-    deps = [
-        "//src/tools/android/java/com/google/devtools/build/android:android_builder_lib",
-        "//third_party:guava",
-        "//third_party:guava-testlib",
-        "//third_party:jsr305",
-        "//third_party:junit4",
-        "//third_party:truth",
-    ],
-)
-
 java_test(
     name = "UnvalidatedAndroidDataTest",
     size = "small",

src/tools/android/java/com/google/devtools/build/android/AndroidResourceProcessingAction.java

@@ -38,7 +38,6 @@
 import com.google.devtools.build.android.Converters.SerializedAndroidDataListConverter;
 import com.google.devtools.build.android.Converters.UnvalidatedAndroidDataConverter;
 import com.google.devtools.build.android.Converters.VariantTypeConverter;
-import com.google.devtools.build.android.SplitConfigurationFilter.UnrecognizedSplitsException;
 import com.google.devtools.common.options.Converters;
 import com.google.devtools.common.options.Converters.CommaSeparatedOptionListConverter;
 import com.google.devtools.common.options.Option;
@@ -476,7 +475,6 @@ public static void main(String[] args) throws Exception {
               options.packageForR,
               new FlagAaptOptions(aaptConfigOptions),
               aaptConfigOptions.resourceConfigs,
-              aaptConfigOptions.splits,
               processedData,
               resourceData,
               generatedSources,
@@ -524,10 +522,7 @@ public static void main(String[] args) throws Exception {
     } catch (MergingException e) {
       logger.log(java.util.logging.Level.SEVERE, "Error during merging resources", e);
       throw e;
-    } catch (IOException
-        | InterruptedException
-        | LoggedErrorException
-        | UnrecognizedSplitsException e) {
+    } catch (IOException | InterruptedException | LoggedErrorException e) {
       logger.log(java.util.logging.Level.SEVERE, "Error during processing resources", e);
       throw e;
     } catch (AndroidManifestProcessor.ManifestProcessingException e) {