Bump com.android.tools.build:manifest-merger to 31.7.3 (#9600)

Context: https://mvnrepository.com/artifact/com.android.tools.build/manifest-merger/31.7.3
Context: https://android.googlesource.com/platform/tools/base/+/master/build-system/manifest-merger

Bumps com.android.tools.build:manifest-merger from 31.7.2 to 31.7.3.

I was not able to find a specific tag matching this release.

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/manifestmerger/build.gradle

@@ -19,7 +19,7 @@ repositories {
 
 dependencies {
     // https://mvnrepository.com/artifact/com.android.tools.build/manifest-merger
-    implementation 'com.android.tools.build:manifest-merger:31.7.2'
+    implementation 'com.android.tools.build:manifest-merger:31.7.3'
 }
 
 sourceSets {