Don't create withres-withoutdex files for R8

The withres-withoutdex files were added in b/195558228 because D8
produced errors when given an input jar that contained both class
and dex files:
Error: com.android.tools.r8.internal.Cc: Cannot create android app from an archive 'out/soong/.intermediates/libcore/libcore-crypto-tests/android_common/withres/libcore-crypto-tests.jar' containing both DEX and Java-bytecode content

It turns out R8 doesn't have this problem, it defaults to ignoring *.dex
files unless the com.android.tools.r8.allowDexInputToR8 system property
is set.  Remove the withres-withoutdex files when using R8, but keep
it in place for D8 for now.

Bug: 302573555
Bug: 303264288
Bug: 303064127
Test: m checkbuild
Test: m Calendar && m Calendar
Test: m framework-minus-apex && m framework-minus-apex
Change-Id: Ib6410f7fef6faf5913476c6423cdd27215c68c45
diff --git a/java/dex.go b/java/dex.go
index 1aa4d1c..348c939 100644
--- a/java/dex.go
+++ b/java/dex.go
@@ -140,9 +140,7 @@
 		Command: `rm -rf "$outDir" && mkdir -p "$outDir" && ` +
 			`rm -f "$outDict" && rm -f "$outConfig" && rm -rf "${outUsageDir}" && ` +
 			`mkdir -p $$(dirname ${outUsage}) && ` +
-			`mkdir -p $$(dirname $tmpJar) && ` +
-			`${config.Zip2ZipCmd} -i $in -o $tmpJar -x '**/*.dex' && ` +
-			`$r8Template${config.R8Cmd} ${config.R8Flags} -injars $tmpJar --output $outDir ` +
+			`$r8Template${config.R8Cmd} ${config.R8Flags} -injars $in --output $outDir ` +
 			`--no-data-resources ` +
 			`-printmapping ${outDict} ` +
 			`-printconfiguration ${outConfig} ` +
@@ -187,7 +185,7 @@
 			Platform:     map[string]string{remoteexec.PoolKey: "${config.REJavaPool}"},
 		},
 	}, []string{"outDir", "outDict", "outConfig", "outUsage", "outUsageZip", "outUsageDir",
-		"r8Flags", "zipFlags", "tmpJar", "mergeZipsFlags"}, []string{"implicits"})
+		"r8Flags", "zipFlags", "mergeZipsFlags"}, []string{"implicits"})
 
 func (d *dexer) dexCommonFlags(ctx android.ModuleContext,
 	dexParams *compileDexParams) (flags []string, deps android.Paths) {
@@ -370,7 +368,6 @@
 	// Compile classes.jar into classes.dex and then javalib.jar
 	javalibJar := android.PathForModuleOut(ctx, "dex", dexParams.jarName).OutputPath
 	outDir := android.PathForModuleOut(ctx, "dex")
-	tmpJar := android.PathForModuleOut(ctx, "withres-withoutdex", dexParams.jarName)
 
 	zipFlags := "--ignore_missing_files"
 	if proptools.Bool(d.dexProperties.Uncompress_dex) {
@@ -408,7 +405,6 @@
 			"outUsage":       proguardUsage.String(),
 			"outUsageZip":    proguardUsageZip.String(),
 			"outDir":         outDir.String(),
-			"tmpJar":         tmpJar.String(),
 			"mergeZipsFlags": mergeZipsFlags,
 		}
 		if ctx.Config().UseRBE() && ctx.Config().IsEnvTrue("RBE_R8") {
@@ -428,6 +424,7 @@
 			Args:      args,
 		})
 	} else {
+		tmpJar := android.PathForModuleOut(ctx, "withres-withoutdex", dexParams.jarName)
 		d8Flags, d8Deps := d8Flags(dexParams.flags)
 		d8Deps = append(d8Deps, commonDeps...)
 		rule := d8