Separate InstallPath from OutputPath

Create a new type InstallPath that is similar to OutputPath to
differentiate intermediates output paths from installed output
paths.

RelPathString is a poorly defined, undocumented function that is
primarily used to get an install path relative to out/soong to
generate an equivalent install path for Make relative to $(OUT_DIR).
Move it to InstallPath for now, and fix the one remaining user on
OutputPath.

Add a method to create an NDK install path so that ndk_sysroot.go
doesn't have to do it manually with PathForOutput.

Bug: 141877526
Test: m checkbuild
Change-Id: I83c5a0bd1fd6c3dba8d3b6d20d039f64f353ddd5
diff --git a/java/app.go b/java/app.go
index 3ee8b8d..e033661 100644
--- a/java/app.go
+++ b/java/app.go
@@ -126,7 +126,7 @@
 	// the install APK name is normally the same as the module name, but can be overridden with PRODUCT_PACKAGE_NAME_OVERRIDES.
 	installApkName string
 
-	installDir android.OutputPath
+	installDir android.InstallPath
 
 	onDeviceDir string
 
@@ -773,7 +773,7 @@
 
 	usesLibrary usesLibrary
 
-	installPath android.OutputPath
+	installPath android.InstallPath
 }
 
 type AndroidAppImportProperties struct {
diff --git a/java/dexpreopt.go b/java/dexpreopt.go
index 6214dac..db6b455 100644
--- a/java/dexpreopt.go
+++ b/java/dexpreopt.go
@@ -22,7 +22,7 @@
 type dexpreopter struct {
 	dexpreoptProperties DexpreoptProperties
 
-	installPath         android.OutputPath
+	installPath         android.InstallPath
 	uncompressedDex     bool
 	isSDKLibrary        bool
 	isTest              bool
@@ -94,7 +94,7 @@
 	return false
 }
 
-func odexOnSystemOther(ctx android.ModuleContext, installPath android.OutputPath) bool {
+func odexOnSystemOther(ctx android.ModuleContext, installPath android.InstallPath) bool {
 	return dexpreopt.OdexOnSystemOtherByName(ctx.ModuleName(), android.InstallPathToOnDevicePath(ctx, installPath), dexpreoptGlobalConfig(ctx))
 }
 
diff --git a/java/java.go b/java/java.go
index f7b0f53..4264ba9 100644
--- a/java/java.go
+++ b/java/java.go
@@ -1795,7 +1795,7 @@
 	isWrapperVariant bool
 
 	wrapperFile android.Path
-	binaryFile  android.OutputPath
+	binaryFile  android.InstallPath
 }
 
 func (j *Binary) HostToolPath() android.OptionalPath {
diff --git a/java/platform_compat_config.go b/java/platform_compat_config.go
index 3d46077..0c973c5 100644
--- a/java/platform_compat_config.go
+++ b/java/platform_compat_config.go
@@ -30,7 +30,7 @@
 	android.ModuleBase
 
 	properties     platformCompatConfigProperties
-	installDirPath android.OutputPath
+	installDirPath android.InstallPath
 	configFile     android.OutputPath
 }