Revert "Move apex module installation into Soong"

This reverts commit e3d156a622.

Reason for revert: b/206119621

Bug: 204136549
Change-Id: I380223b86660c27bea8f5dcc2d61f32df2704c02
Fixes: 206119621

apex/apex.go

@@ -399,14 +399,14 @@ type apexBundle struct {
 	// vendor/google/build/build_unbundled_mainline_module.sh for more detail.
 	bundleModuleFile android.WritablePath
 
-	// Target directory to install this APEX. Usually out/target/product/<device>/<partition>/apex.
+	// Target path to install this APEX. Usually out/target/product/<device>/<partition>/apex.
 	installDir android.InstallPath
 
-	// Path where this APEX was installed.
-	installedFile android.InstallPath
-
-	// Installed locations of symlinks for backward compatibility.
-	compatSymlinks android.InstallPaths
+	// List of commands to create symlinks for backward compatibility. These commands will be
+	// attached as LOCAL_POST_INSTALL_CMD to apex package itself (for unflattened build) or
+	// apex_manifest (for flattened build) so that compat symlinks are always installed
+	// regardless of TARGET_FLATTEN_APEX setting.
+	compatSymlinks []string
 
 	// Text file having the list of individual files that are included in this APEX. Used for
 	// debugging purpose.
@@ -431,10 +431,6 @@ type apexBundle struct {
 	modulePaths []string
 }
 
-func (*apexBundle) InstallBypassMake() bool {
-	return true
-}
-
 // apexFileClass represents a type of file that can be included in APEX.
 type apexFileClass int
 
@@ -2090,9 +2086,7 @@ func (a *apexBundle) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 		a.linkToSystemLib = false
 	}
 
-	if a.properties.ApexType != zipApex {
-		a.compatSymlinks = makeCompatSymlinks(a.BaseModuleName(), ctx, a.primaryApexType)
-	}
+	a.compatSymlinks = makeCompatSymlinks(a.BaseModuleName(), ctx)
 
 	////////////////////////////////////////////////////////////////////////////////////////////
 	// 4) generate the build rules to create the APEX. This is done in builder.go.